In 1784, This was the very first instance that the physical matching of evidence in a murder case led to a conviction. Evidence of a newspaper with a torn edge in a pistol matched the newspaper in his pocket.
In 1854, Police in San Francisco began using photos from crime scenes as evidence. They also instituted these photos for identification on certain criminals.
Reporters Henry Faulds and William James Herschel published a paper regarding the uniqueness of fingerprints. Scientist Francis Galton adapted their findings and found certain patterns and characteristics of fingerprints.
Aerospace Corporation developed technology that would identify gun residue. The importance of this advancement in forensics allowed scientists to link suspects to a crime scene and show how close they were to the gun.
Forensic Scientists developed a DNA fingerprinting system to identify suspects related to certain crimes. In 1983, this advancement led to the conviction of Colin Pitchfork, clearing the other main suspect, who was innocent, from being convicted if it weren't for this.
In 2011, Michigan State University developed a technology to link both sketches drawn of suspects and mugshots in criminal databases. These sketches are drawn up by artists from the information given by the witness. These sketches will exactly hand-match the criminals responsible for a crime.