Sherlock Holmes was a clever ...

A ... is a person who steals things.

Murderers and thieves are all ...

... help identify people.

The police couldn't identify the ... used in the murder. (singular)

The police have found a ... who saw the thief. They are going to interrogate her.

The police examined the ... ... carefully.

The fire destroyed all ... and this made it very difficult for the police to solve the crime.