Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

Prove that twice of ten is the same as twice of eleven.

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

What two things can you never eat for breakfast?

Which is heavier: a ton of bricks or a ton of feathers?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

Detective Rockford was jogging near the beach at 4:30 am.
He hears a sound near the shack "No Michael, Please Do not shoot me".
Next instance he heard the sound of gunfire. Rockford rushes to the shack where he finds women lying dead and a gun in close proximity of three "Doctore Lawyer and a Teacher".

Rockford immediately knew that the Lawyer has committed the crime. How?