Here's a 1950s reenactment of a crime scene and the kind of investigation that typically follows. This is part 1 of 4.

A man is found dead with a bullet hole in his chest and a revolver next to him. The detectives take stock of the dead man and the crime scene, dusting for fingerprints, removing a bullet from a wall, and documenting the scene by taking extensive photographs. The scene appears to be a suicide.

Forensic detectives measure the bullet holes in the victim and the wall. An ballistics expert removes the bullet from the wall, and they go over the room again. The wife is questioned about her husband's antics leading up to his death. She cries and buries her head in a pillow. 

The lead detective discusses the matter with a man at the morgue. They look at pictures of bullet wounds.

The corpse lies on a table at the morgue, ready to be examined. The dead man's shirt is removed and hung up to dry for reviewing later at the chem lab. A photographer sets up his large camera to photograph the dead man's bullet wound. A pathologist dips the man's hand into paraffin wax to eventually make a mold of the man's hand.