现场指掌纹无损转印采集系统刑侦与司法鉴定应用介绍

 

现场指掌纹无损转印采集系统刑侦与司法鉴定应用介绍

技术原理

核心功能与实战价值

1. 全客体全类型痕迹适配，攻克疑难指掌纹提取行业痛点

    

   系统彻底突破了传统取证方法的客体材质与表面状态限制，无论是纸张、皮革、墙面等渗透性客体，还是金属、玻璃、漆面、塑料等非渗透性客体，亦或是粗糙纹理、高反光镜面、深色吸光、复杂花纹等传统方法完全失效的疑难客体，均能实现痕迹的有效提取。尤其针对汗潜、油潜、灰潜、潜血及多成分混合形成的疑难指掌纹，具备稳定的提取效果，彻底解决了现场勘查中长期存在的 “看得见、取不出、用不了” 的取证盲区，大幅拓宽了现场指掌纹物证的可提取范围，从根源上提升了侵财、命案等各类案件的痕迹物证提取率。
    
2. 全流程无损提取，实现形态证据与 DNA 生物检材同步保全

    

   纯物理转印提取过程全程无化学试剂参与、无机械损伤，不破坏客体原貌与痕迹的原始状态，完整保留物证的可复核性、可追溯性，完全符合司法鉴定对物证完整性的核心原则。在精准提取指掌纹形态特征的同时，专用提取明胶可同步粘取痕迹中附带的脱落皮屑、微量血渍、体液斑迹等生物检材，实现指掌纹形态证据与 DNA 遗传证据的关联性提取、空间位置同步固定，彻底改变了传统现场勘查中两类证据分别提取、关联性缺失的弊端，同时完整保留生物检材的 DNA 活性，不影响后续实验室的遗传学检验，为案件侦查提供 “指纹同一认定 + DNA 身份锁定” 的双重核心证据，构建起闭环完整的司法证据链。
    
3. 法庭科学级高清成像，适配指纹同一认定与自动识别系统

    

   系统采用高灵敏度线阵成像技术，光学分辨率不低于 1000DPI，可极致清晰地呈现指纹、掌纹的一级、二级、三级细节特征，包括纹线的起点、终点、分歧、结合等核心比对特征，以及汗孔、纹线细小划痕等微观特征。设备采用一键式智能操作，可同步输出未经处理的原始图像与经专业算法优化的增强图像，无畸变、无背景干扰、无特征丢失，输出图像完全符合指纹自动识别系统（AFIS）的入库比对标准，也满足人工特征比对的法庭科学技术要求，提取的图像具备完整的司法证据效力，可直接作为案件诉讼与法庭质证的合法证据使用。
    
4. 单兵便携一体化设计，适配复杂现场全流程勘查作业

    

   设备采用高度集成化设计，体积小巧、重量轻盈，内置大容量长效可充电锂电池，支持完全脱离外接电源的野外、偏远地区现场独立作业，完美适配无市电环境的现场勘查需求。一键式极简操作流程，无需复杂的专业培训，基层勘查人员即可快速上手完成痕迹提取，大幅降低了现场操作门槛。设备可配套便携仿生熏显器使用，先对潜隐痕迹进行无损增强，再完成转印提取与数字化固定，形成 “潜隐痕迹增强 - 无损转印提取 - 高清数字化固定 - 证据导出归档” 的完整现场疑难痕迹处理全流程，完全支持勘查人员单兵独立完成复杂现场的全流程勘查作业。
    
5. 多语言国际化适配，满足全球执法与司法鉴定场景需求

    

   系统操作界面支持英文等多语言切换，可适配不同国家和地区执法人员的使用习惯；配套提供英文版产品说明书与符合国际通用标准的电源适配器，同时提供多种尺寸规格的专用提取明胶，可适配不同大小、不同类型的痕迹提取需求，完全符合全球各国刑事侦查、司法鉴定、执法取证的技术规范与使用标准，可广泛应用于全球各类执法与司法检验场景。
    

刑事侦查与司法鉴定实战应用场景

1. 系列侵财案件疑难指掌纹提取与案件串并侦破

    

   是入室盗窃、抢劫、盗抢机动车等系列侵财案件现场勘查的核心装备。针对案件现场常见的铝合金窗框、光泽漆面家具、电器外壳、抛光石材台面、玻璃器皿、饮料瓶、作案工具手柄等客体，传统粉末显现、502 胶熏显、光学拍照等方法，极易受客体高反光、表面纹理、复杂花纹背景干扰，难以提取可用于同一认定的有效指纹。通过本系统的物理转印与背底剥离技术，可彻底规避客体背景干扰，直接提取客体表面遗留的汗潜、油潜指掌纹，获取符合比对标准的清晰图像，通过指纹自动识别系统比对直接锁定犯罪嫌疑人，实现系列案件的快速串并与侦破，破解了传统侵财案件现场指纹提取率低、案件难串并的侦查痛点。
    
2. 命案、暴力犯罪案件潜血痕迹与血潜指纹固定

    

   在命案、故意伤害等暴力犯罪案件的现场勘查中，针对深色衣物、花色床单、木质家具、刀具手柄等深色、复杂背景客体上遗留的潜血指纹、血潜混合指纹，传统化学显现、光学拍照方法难以剥离背景干扰，无法获取清晰完整的纹线特征。通过本系统的转印提取技术，可将潜血指纹完整无损地转移至明胶片上，通过高精度扫描成像彻底剥离深色、复杂背景干扰，获取对比度极高、纹线特征完整的高清指纹图像，为案件性质判定、嫌疑人锁定、作案过程还原提供关键物证；同时可同步提取痕迹中的微量血迹生物检材，实现指纹形态证据与 DNA 遗传证据的双重印证，大幅提升命案侦破效率。
    
3. 性侵案件接触性痕迹与生物检材同步提取

    

   针对性侵案件现场的床单、被褥、衣物、受害人皮肤、塑料包装等载体上的接触性掌纹、指印，传统提取方法易破坏痕迹中的脱落细胞，无法兼顾形态证据提取与生物检材保全。本系统采用的生物相容性提取明胶，可在无损提取指掌纹形态特征的同时，同步粘取痕迹中附带的脱落上皮细胞、皮屑、微量体液等生物检材，实现形态证据与 DNA 证据的关联性提取、同步固定，既为嫌疑人同一认定提供指纹证据，也为后续 DNA 鉴定提供高成功率的检材，大幅提升性侵案件的物证获取率与侦破效率。
    
4. 司法鉴定实验室疑难物证终极复核与检验瓶颈突破

    

   在刑事技术实验室、司法鉴定机构的物证检验环节，针对送检的疑难客体，或是经过粉末显现、502 胶熏显、多波段光源照射等常规方法处理失败后，无法提取有效痕迹的疑难物证，本系统可作为终极复核技术手段。纯物理的转印提取方法不会对物证造成二次破坏，可最大程度保留痕迹的原始状态，往往能从常规方法失效的客体上，成功提取到可用于同一认定的关键指掌纹痕迹，突破物证检验瓶颈，解决大量久侦未破的积案、难案中的痕迹检验难题。
    
5. 犯罪现场重建与证据链立体化构建

    

   通过对现场特定区域的混合痕迹进行精准转印提取，可完整保留不同痕迹物质（灰尘、血液、汗液、油脂）的叠加顺序、空间分布关系，有效分析作案人的接触顺序、动作流程、行为轨迹，为犯罪过程还原、现场重建提供扎实的物证基础；同时实现了指纹形态证据与 DNA 生物证据的一一对应、关联印证，构建起完整、闭环的现场证据链，大幅提升证据体系的完整性与法庭采信度。
    

核心技术参数

实战应用案例

1. 某市发生跨区域系列入室盗窃案，犯罪嫌疑人戴手套作案，具备较强的反侦察意识，仅在现场的铝合金窗户把手、抛光石材台面、漆面衣柜等客体上留下微弱的汗潜指印。现场勘查人员采用传统粉末显现、502 胶熏显等常规方法，均因客体高反光、表面纹理干扰，无法提取到可用于比对的有效指纹，案件串并与侦查工作难以推进。刑事技术人员使用本现场指掌纹无损转印采集系统，对 14 起关联案件现场提取的 21 件疑难客体进行痕迹转印提取，彻底规避了客体高反光、纹理背景的干扰，成功从 17 件客体上提取到具备完整二级特征的清晰指掌纹图像，通过指纹自动识别系统（AFIS）比对，直接锁定了犯罪嫌疑人，最终成功破获该跨区域系列盗窃案，带破案件 36 起，涉案金额超 160 万元。
    
2. 某县发生一起恶性杀人案，受害人被杀害于家中卧室，现场勘查人员在受害人花色床单、作案刀具深色木质手柄上，发现了肉眼难以识别的潜血指纹痕迹。由于客体背景花色复杂、颜色较深，传统光学拍照、化学显现方法均无法剥离背景干扰，无法获取清晰的纹线特征，案件侦查陷入僵局。技术人员使用本系统，对可疑痕迹区域进行无损转印提取，将潜血指纹完整转移至明胶片上，通过高精度扫描成像，彻底剥离了客体的复杂花色与深色背景，成功获取了 3 枚纹线清晰、特征完整的犯罪嫌疑人潜血指纹；同时通过提取明胶上的微量血迹检材，成功获得了嫌疑人的完整 STR 分型，指纹与 DNA 结果形成双重印证，36 小时内即锁定并抓获犯罪嫌疑人，快速破获该起命案。
    

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Application Introduction of the On-Site Fingerprint and Palm Print Non-Destructive Transfer Collection System in Criminal Investigation and Forensic Identification

Technical Principle

Core Functions and Practical Value

1. Full Object and Full Type Trace Adaptation, Overcoming the Industry Pain Point of Difficult Fingerprint and Palm Print Extraction

    

   The system completely breaks through the limitations of object material and surface state of traditional evidence collection methods. Whether it is permeable objects such as paper, leather and walls, non-permeable objects such as metal, glass, paint and plastic, or difficult objects such as rough texture, high-reflective mirror, dark light absorption and complex patterns where traditional methods are completely ineffective, it can achieve effective extraction of traces. Especially for difficult fingerprints and palm prints formed by latent sweat, latent oil, latent dust, occult blood and multi-component mixtures, it has a stable extraction effect, completely solving the evidence collection blind spot of "visible, cannot be extracted, cannot be used" that has long existed in on-site investigation, greatly broadening the extractable range of on-site fingerprint and palm print physical evidence, and fundamentally improving the extraction rate of trace physical evidence in various cases such as property infringement and homicide.
    
2. Whole-Process Non-Destructive Extraction, Realizing Simultaneous Preservation of Morphological Evidence and DNA Biological Specimens

    

   The pure physical transfer extraction process has no chemical reagent participation and no mechanical damage throughout the process, does not damage the original appearance of the object and the original state of the trace, completely retains the reviewability and traceability of the physical evidence, and fully complies with the core principle of forensic identification for the integrity of physical evidence. While accurately extracting the morphological characteristics of fingerprints and palm prints, the special extraction gelatin can simultaneously adhere to the exfoliated dander, trace blood stains, body fluid stains and other biological specimens attached to the traces, realizing the correlated extraction and synchronous fixation of the spatial position of fingerprint and palm print morphological evidence and DNA genetic evidence, completely changing the disadvantage of separate extraction and lack of correlation of the two types of evidence in traditional on-site investigation. At the same time, it completely retains the DNA activity of biological specimens, does not affect the subsequent genetic testing in the laboratory, provides dual core evidence of "fingerprint identification + DNA identity locking" for case investigation, and builds a closed-loop and complete judicial evidence chain.
    
3. Forensic Science Grade High-Definition Imaging, Adapting to Fingerprint Identification and Automatic Fingerprint Identification System

    

   The system adopts high-sensitivity linear array imaging technology, with an optical resolution of not less than 1000 DPI, which can clearly present the primary, secondary and tertiary detail features of fingerprints and palm prints, including the core comparison features such as the starting point, ending point, bifurcation and combination of ridges, as well as microscopic features such as sweat pores and tiny scratches on the ridges. The equipment adopts one-key intelligent operation, which can simultaneously output the unprocessed original image and the enhanced image optimized by professional algorithms, without distortion, background interference and feature loss. The output image fully complies with the warehousing and comparison standards of the Automatic Fingerprint Identification System (AFIS), and also meets the forensic science technical requirements of manual feature comparison. The extracted image has complete judicial evidence validity and can be directly used as legal evidence for case litigation and court cross-examination.
    
4. Individual Soldier Portable Integrated Design, Adapting to the Whole Process Investigation Operation of Complex Scenes

    

   The equipment adopts a highly integrated design, with small size and light weight. It has a built-in large-capacity long-life rechargeable lithium battery, which supports independent operation in field and remote area scenes completely without external power supply, and perfectly adapts to the on-site investigation needs of environments without mains power. The one-key minimalist operation process does not require complex professional training, and grass-roots investigators can quickly get started to complete trace extraction, which greatly reduces the threshold of on-site operation. The equipment can be used with a portable bionic developer. First, it enhances the latent traces without damage, then completes the transfer extraction and digital fixation, forming a complete whole process of on-site difficult trace processing of "latent trace enhancement - non-destructive transfer extraction - high-definition digital fixation - evidence export and archiving", which fully supports the investigators to independently complete the whole process investigation of complex scenes by individual soldiers.
    
5. Multi-Language International Adaptation, Meeting the Needs of Global Law Enforcement and Forensic Identification Scenarios

    

   The system operation interface supports multi-language switching including English, which can adapt to the usage habits of law enforcement officers in different countries and regions. It is equipped with an English version of the product manual and a power adapter that complies with international general standards. At the same time, it provides special extraction gelatin with various sizes and specifications, which can adapt to the extraction needs of traces of different sizes and types. It fully complies with the technical specifications and usage standards of criminal investigation, forensic identification, and law enforcement forensics in countries around the world, and can be widely used in various law enforcement and judicial inspection scenarios around the world.
    

Practical Application Scenarios in Criminal Investigation and Forensic Identification

1. Difficult Fingerprint and Palm Print Extraction and Case Combination Detection of Series Property Infringement Cases

    

   It is the core equipment for on-site investigation of series property infringement cases such as burglary, robbery and motor vehicle theft. For objects commonly found at the scene of the case, such as aluminum alloy window frames, glossy paint furniture, electrical shells, polished stone countertops, glassware, beverage bottles, and tool handles, traditional methods such as powder development, 502 glue development, and optical photography are very vulnerable to the interference of high reflection, surface texture, and complex pattern background of the object, and it is difficult to extract effective fingerprints that can be used for identification. Through the physical transfer and background stripping technology of this system, the object background interference can be completely avoided, the latent sweat and oil fingerprints left on the surface of the object can be directly extracted, clear images that meet the comparison standards can be obtained, the criminal suspect can be directly locked through the comparison of the Automatic Fingerprint Identification System, and the rapid combination and detection of series cases can be realized, solving the investigation pain point of low fingerprint extraction rate and difficult case combination in traditional property infringement cases.
    
2. Fixation of Occult Blood Traces and Blood Latent Fingerprints in Homicide and Violent Crime Cases

    

   In the on-site investigation of violent crime cases such as homicide and intentional injury, for the occult blood fingerprints and blood latent mixed fingerprints left on dark clothes, colored bed sheets, wooden furniture, knife handles and other dark and complex background objects, traditional chemical development and optical photography methods are difficult to strip the background interference, and cannot obtain clear and complete ridge features. Through the transfer extraction technology of this system, the occult blood fingerprints can be completely and non-destructively transferred to the gelatin sheet, and the dark and complex background interference can be completely stripped through high-precision scanning imaging, so as to obtain high-definition fingerprint images with extremely high contrast and complete ridge features, providing key physical evidence for the determination of case nature, suspect locking, and restoration of the crime process. At the same time, it can simultaneously extract trace blood stain biological specimens in the traces, realizing double confirmation of fingerprint morphological evidence and DNA genetic evidence, and greatly improving the efficiency of homicide detection.
    
3. Simultaneous Extraction of Contact Traces and Biological Specimens in Sexual Assault Cases

    

   For contact palm prints and fingerprints on carriers such as bed sheets, bedding, clothing, victim's skin, plastic packaging at the scene of sexual assault cases, traditional extraction methods are easy to damage the exfoliated cells in the traces, and cannot take into account the extraction of morphological evidence and the preservation of biological specimens. The biocompatible extraction gelatin adopted by this system can simultaneously adhere to the exfoliated epithelial cells, dander, trace body fluids and other biological specimens attached to the traces while non-destructively extracting the morphological characteristics of fingerprints and palm prints, realizing the correlated extraction and synchronous fixation of morphological evidence and DNA evidence. It not only provides fingerprint evidence for the identification of suspects, but also provides high-success rate specimens for subsequent DNA identification, greatly improving the physical evidence acquisition rate and detection efficiency of sexual assault cases.
    
4. Ultimate Review of Difficult Physical Evidence in Forensic Laboratories and Breakthrough of Inspection Bottlenecks

    

   In the physical evidence inspection link of criminal technology laboratories and forensic institutions, for the difficult objects submitted for inspection, or the difficult physical evidence that cannot extract effective traces after the failure of conventional methods such as powder development, 502 glue development, and multi-band light source irradiation, this system can be used as the ultimate review technical means. The pure physical transfer extraction method will not cause secondary damage to the physical evidence, and can retain the original state of the traces to the greatest extent. It can often successfully extract key fingerprint and palm print traces that can be used for identification from objects where conventional methods fail, break through the bottleneck of physical evidence inspection, and solve the trace inspection problems in a large number of long-term unsolved cases and difficult cases.
    
5. Crime Scene Reconstruction and Three-Dimensional Construction of Evidence Chain

    

   Through the accurate transfer and extraction of mixed traces in specific areas of the scene, the superposition order and spatial distribution relationship of different trace substances (dust, blood, sweat, grease) can be completely retained, which can effectively analyze the contact order, action process and behavior track of the perpetrator, and provide a solid physical evidence basis for the restoration of the criminal process and scene reconstruction. At the same time, it realizes the one-to-one correspondence and correlation verification of fingerprint morphological evidence and DNA biological evidence, builds a complete and closed on-site evidence chain, and greatly improves the integrity and court admissibility of the evidence system.
    

Core Technical Parameters

Practical Application Cases

1. A series of cross-regional burglary cases occurred in a city. The suspect committed the crime with gloves and had a strong sense of anti-investigation, leaving only weak latent sweat fingerprints on the aluminum alloy window handles, polished stone countertops, painted wardrobes and other objects at the scene. The on-site investigators used conventional methods such as traditional powder development and 502 glue development, but failed to extract effective fingerprints that can be used for comparison due to the high reflection of the object and the interference of surface texture, making it difficult to carry out case combination and investigation. Criminal technicians used this On-Site Fingerprint and Palm Print Non-Destructive Transfer Collection System to carry out trace transfer and extraction on 21 difficult objects extracted from the scene of 14 related cases, completely avoiding the interference of high reflection and texture background of the objects. They successfully extracted clear fingerprint and palm print images with complete secondary features from 17 objects, directly locked the criminal suspect through the comparison of the Automatic Fingerprint Identification System (AFIS), finally successfully solved the cross-regional series of burglary cases, uncovered 36 related cases, involving an amount of more than 1.6 million yuan.
    
2. A vicious homicide case occurred in a county, the victim was killed in the bedroom of his home. The on-site investigators found traces of occult blood fingerprints that were difficult to identify with the naked eye on the victim's colored bed sheet and the dark wooden handle of the murder weapon. Due to the complex pattern and dark color of the object background, traditional optical photography and chemical development methods could not strip the background interference and obtain clear ridge features, so the investigation of the case fell into a deadlock. Technicians used this system to carry out non-destructive transfer and extraction of the suspicious trace area, completely transferred the occult blood fingerprints to the gelatin sheet, and completely stripped the complex pattern and dark background of the object through high-precision scanning imaging, successfully obtained 3 clear and complete latent blood fingerprints of the suspect with complete ridge features. At the same time, through the trace blood stain specimens on the extracted gelatin, the complete STR typing of the suspect was successfully obtained. The fingerprint and DNA results formed double confirmation, and the suspect was locked and arrested within 36 hours, and the homicide case was quickly solved.