What does this simple rebus mean?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Why is the Hole below a Lock?

What demands an answer, but asks no questions

Can You Find The Poor LOST PUPPY Hidden In The Park in 20 Seconds?

Sherlock breaks into a crime scene. The victim is the owner who is slumped dead on a chair and have a bullet hole in his head. A gun lies on the floor and a cassette recorder is found on the table. On pressing the play button, Sherlock hears the message 'I have committed sins in my life and now I offer my soul to the great Lord' and followed a gunshot Sherlock smiles and informed the police that's its a murder.

Why did he think so?

How can I get the answer 24 by only using the numbers 8,8,3,3?

You can use the main signs add, subtract multiply and divide.

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Today is a very icy and cold morning in Newcastle. Mr Shearer, an office bus driver arrived to pick up the employees from the last stop. Shearer suddenly remembers that he needs to pick a newly joined 4miles to the north. Mr Shearer lost his direction compass, a few minutes later Shearer is able to figure that he is moving in the correct direction i.e. north. How did Shearer know that he is moving in the correct direction?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?