detectives noun police officers who investigate crimes
witnesses noun people who see something which has happened, and then tell others (e .g. the police) about it
victims noun people who are hurt or killed by somebody in a crime
murderer noun a person who plans and kills another person
murder noun the crime of killing a person illegally and deliberately
evidence noun the facts, signs, etc. which tell you who committed a crime
suspects noun people who are thought to be guilty of a crime
prove (a mystery) verb to find the correct answer to why something happened
solve (sth) verb to use facts and evidence to show something is true