Abstract: A method of enhancing a footwear impression formed on a porous surface using a potassium ferrocyanide solution for footwear impression enhancement includes: forming a porous surface sample by leaving footwear impressions into an object having a porous surface; preparing a potassium ferrocyanide solution for footwear impression enhancement; and applying the potassium ferrocyanide solution for footwear impression enhancement to the porous surface sample.

Abstract: A footprint generator capable of applying a constant force includes: a base plate in which a target surface may be on an upper surface of the base plate; a shoe mounting member that is apart from the upper surface of the base plate and capable of mounting a shoe; a driving unit that is apart from the upper surface of the base plate and capable of moving the shoe mounting member up and down; and a force measuring unit configured to measure an impact force when the shoe mounting member descends and contacts the shoe with the target surface to generate a footprint on the target surface.

Abstract: A method of calculating a bleeding site and a trajectory of a bloodstain scattered by impact includes: obtaining, by an electronic device calculating the bleeding site and the trajectory of the bloodstain scattered by impact, captured image information; analyzing the obtained captured image information, by the electronic device, and calculating a collision angle and measuring a direction angle of the bloodstain scattered by impact; calculating, by the electronic device, a coordinate value of the bleeding site by using a linear trajectory method; calculating, by the electronic device, a trajectory of a drop of blood based on the calculated coordinate value of the bleeding site by using a parabolic trajectory method considering gravity and air resistance; and displaying and outputting, by the electronic device, a linear trajectory of the drop of blood and a parabolic trajectory considering gravity and air resistance of the drop of blood on a 3D space.

Abstract: The present disclosure relates to a ferrocene-based compound having high selectivity for sulfide ion. The ferrocene-based compound is obtained by reacting a ferrocene starting material with one or more organic compound selected from a nitrile, a methyl ester and an ethyl ester, and a chemical sensor in solution state is prepared by mixing the compound with an organic solvent. The chemical sensor according to the present disclosure has high selectivity and sensitivity for sulfide ion even at low concentration and may be used as a chemical sensor for detecting hydrogen sulfide in solution state by allowing visual inspection of sulfide ion.

Abstract: A developed fingerprint level determination apparatus includes: a fingerprint image acquisition unit configured to obtain at least two or more developed fingerprint images according to a fingerprint development technique; and a ridge level determination unit configured to check respective ridge development level information of the obtained fingerprint images and compare the respective ridge development level information with each other.

Abstract: Provided is a method of analyzing microhaplotypes by using a next generation sequencing (NGS). The method of analyzing microhaplotypes by using the NGS includes: (a) performing a multiplex PCR for simultaneously amplifying the microhaplotypes; (b) performing an indexing PCR by using a product of the multiplex PCR; and (c) performing the NGS by using a product of the indexing PCR.

Abstract: A method of generating artificial latent fingerprints for latent fingerprint development experiments includes: printing an artificially created fingerprint shape on paper for application to a target surface; thermally transferring the fingerprint shape printed on the paper to an etching plate by applying a certain range of heat and pressure to the paper on which the fingerprint shape is printed; forming a three-dimensional fingerprint shape on the etching plate by performing an etching process according to the fingerprint shape transferred to the etching plate; patterning the three-dimensional fingerprint shape formed on the etching plate with a molding member; and forming a latent fingerprint on the target surface using an artificial fingerprint solution from the three-dimensional fingerprint shape formed by patterning with the molding member.

Abstract: Artificial blood for a bloodstain pattern analysis includes water, an amino acid solution, bovine serum albumin, hemoglobin from bovine blood, potassium ferricyanide, sodium hyaluronate, sodium chloride, and tar color.

Abstract: An apparatus for shooting scattered blood marks at right angles includes: a first body including a lens coupling portion formed to couple a camera lens and a housing portion having a hollow inside and forming an opening at one end thereof; and a second body including a surface contact portion formed to contact a target surface including scattered blood marks and an insertion portion extending from the surface contact portion and inserted into the housing portion to adjust a distance between the scattered blood marks and the camera lens.

Abstract: A fingerprint generator capable of applying a constant force includes: a base plate in which a target surface may be on an upper surface of the base plate; a fingerprint mounting unit that is apart from the upper surface of the base plate and capable of mounting a fingerprint molding body having a fingerprint shape thereon on a lower portion of the fingerprint mounting unit; a driving unit that is apart from the upper surface of the base plate and capable of moving the fingerprint mounting unit up and down; and a force measuring unit configured to measure an impact force when the fingerprint mounting unit descends and contacts the fingerprint shape with the target surface to generate a fingerprint on the target surface.

Abstract: A method of determining footprint identity using a dimension reduction algorithm according to an embodiment includes: pre-processing to process three-dimensional (3D) image data about footprints of a first person and a second person and convert the 3D image data into one-dimensional (1D) data about the footprints of the first person and the second person; calculating a distribution of cross-correlation coefficients between two pieces of 1D data about footprints of the first person (SC: same footwear correlation) and a distribution of cross-correlation coefficients between the 1D data about the footprints of the first person and the second person (DC: difference footwear correlation); and calculating a likelihood ratio based on the SC and the DC to determine the degree of correspondence between the footprints of the first person and the second person.

Abstract: The present disclosure relates to a ferrocene-based compound having high selectivity for sulfide ion. The ferrocene-based compound is obtained by reacting a ferrocene starting material with one or more organic compound selected from a nitrile, a methyl ester and an ethyl ester, and a chemical sensor in solution state is prepared by mixing the compound with an organic solvent. The chemical sensor according to the present disclosure has high selectivity and sensitivity for sulfide ion even at low concentration and may be used as a chemical sensor for detecting hydrogen sulfide in solution state by allowing visual inspection of sulfide ion.

Abstract: A composition for detecting a bloodstain includes: 3-aminophthalhydrazide; glycine; sodium hydroxide; and sodium phosphate dibasic heptahydrate.

Abstract: The present invention relates to an aptasensor for detecting a female-specific trace of blood including an aptamer which is used as a biosensor and emits light as the aptamer is bound to the female-specific trace of blood, and a detection apparatus using the same. The aptasensor for detecting a trace of blood to discriminate genders from the trace of blood at a crime scene has a configuration in which the aptasensor emits light as the aptasensor is binding to the female-specific trace of blood, so that genders of a suspect and a victim is distinguished from each other at the crime scene.

Abstract: A system and method for proving forgery of digital file using a smart phone proves whether digital file recorded as digital evidence is tampered after the digital file is created, and is used in digital forensic and criminal investigation by proving that the digital file is not forged through the forgery confirmation system, and the digital file is used for substituting for notary fee, and used as data for proving a situation in an incident, data for proving foundation works after building construction, or evidence data for voice file in a threatening case. Since content transmitting information while using smart phone is stored as digital data through screen capture and a list of applications executed before the capture is converted and stored as hash value, the digital information authentication system through smart phone screen capture confirms actual facts thereafter by proving that the corresponding content is an original copy.