Réponse :

1.

blood stains: 4

Fingerprints: 1

Footprints: 3

Magnifying glasses: 2

2.

Clue: Indice

Evidence: preuve

Investigate: enquêter

Solve a mystery: résoudre un mystère

3.

Murderer: a person who kill somebody...

Victim: A person who was attacked...

Suspect: a person who is suspected...

Witness: a person who sees something...

detective: A person who gathers information....