Question

What did Edmond Locard contribute to forensic science? Question 1 options: invented blood typing system invented DNA typing proposed the exchange principle invented CODIS

Answer 1

Edmond Locard contributed to forensic science by formulating the exchange principle, which states that every contact leaves a trace. This principle revolutionized forensic science and laid the groundwork for modern investigative techniques.

Step-by-step explanation:

Edmond Locard was a French forensic scientist who made significant contributions to the field of forensic science. He is mainly known for formulating the exchange principle, which states that every contact leaves a trace. This principle is the foundation of forensic science and emphasizes the importance of collecting and analyzing trace evidence at a crime scene.

Locard believed that when a crime occurs, the perpetrator leaves behind traces of their presence and takes away traces of the crime scene. These traces can include physical evidence such as hair, fibers, fingerprints, and DNA, as well as less obvious evidence like odors or microscopic particles. By collecting and analyzing these traces, forensic scientists can reconstruct events and identify individuals involved in a crime.

Locard's exchange principle revolutionized forensic science and laid the groundwork for modern investigative techniques. It has helped forensic scientists solve countless cases by linking suspects to crime scenes or connecting different crime scenes to a single perpetrator based on shared evidence.

Answer 2

Edmond Locard contributed to forensic science by proposing the exchange principle, which is foundational for evidence collection in crime investigation, but he did not invent blood typing, DNA typing, or CODIS.

Step-by-step explanation:

Edmond Locard, a pioneering forensic scientist, proposed the fundamental exchange principle, which states that every contact leaves a trace. Locard's principle is a cornerstone of forensic science, surmising that criminals will always bring something into the crime scene and leave with something from it, providing crucial evidence to investigators. Locard's Exchange Principle laid the groundwork for modern forensic techniques, but he did not invent blood typing, DNA typing, or CODIS—these developments occurred later. For instance, the blood typing system was discovered by Karl Landsteiner in the early 20th century, while DNA typing, also known as DNA fingerprinting, was invented by Dr. Alec Jeffreys, as demonstrated in an immigration case where DNA analysis evidence was crucial in verifying a boy's relationship with his mother.