Help Detective Lewis finish her official crime report by choosing the correct word for each blank.

The suspect whose alibi was completely fake tried to sneak out the back door.

Unfortunately for him, the mysterious informant, from whom the detective received the anonymous tip, had already blocked the exit.

Later, the police searched the abandoned warehouse where the stolen jewels were hidden inside a giant donut box.

The suspect whose alibi was completely fake tried to sneak out the back door.

We use whose to show possession (the alibi belongs to the suspect).

Unfortunately for him, the mysterious informant, from whom the detective received the anonymous tip, had already blocked the exit.

We use whom instead of "who" in formal registers when it is the object of a preposition (like "from").

Later, the police searched the abandoned warehouse where the stolen jewels were hidden inside a giant donut box.

We use the relative adverb where to refer to a physical place or location.