The Microscope is discovered allowing for the discovery of more physical
Test developed by Carl W. Scheele to detect Arsenic in corpses
The Polarizing microscope is invented
Photography began to be used a evidence in cases
System that identifies people by physical appearance, eventually placed by Fingerprinting
Karl Landsteiner discovered ABO Blood typing
Albert Osborn Made the "Questioned Documents"
Edmon Locard proposed that when two objects touch each other a cross transfer of material occurs. Therefore one can link a suspect to a crime scene with this form of evidence.
The Los Angeles Police Department Crime Lab is established. Making this the first crime lab in the United States.
The department is established and lead by Dr. Paul Kirk
The Federal Bureau Institution laboratory is opened under Director J. Edgar Hoover
The Forensic Science Research&Training center opens