How do forensic scientists determine blood type from a crime scene?

Forensic scientists determine blood type from a crime scene through a process called serology. They use antibodies to test for the presence of specific antigens on the surface of red blood cells. By combining the blood sample with antibodies that react with different blood types, scientists can observe agglutination (clumping) which indicates the blood type. This information is crucial in criminal investigations as it helps to identify potential suspects and link them to the crime scene. In the USA, this process follows strict protocols to ensure accuracy and reliability in the justice system.

Remember to always cite your sources and give credit to the creators whose work you used!