Solution:

10 o'clock + 4 hours = 2 o'clock.

Solution:

Newspaper delivery man was the murderer because of absence of Wednesday and Thursday missing newspaper.
This indicates he already know that there is no one to read it.

Solution:

Mark Benson '?' = question MARK, so the note on the door reads 'Question Mark Crimson broke your window.'

Solution:

9

1(Mr. Beckham) + 1(Mrs. Beckham) + 6 (daughters) + 1 (brother).

Solution:

The bus doesn't have side mirrors and windshield wipers.

Solution:

Frank was born in room #1933

Solution:

11

10 people have pair of eyes, so 20 eyes.
So we have 10 people in addition to the man who dropped the book. She cannot look at herself, but she is still in the Church.

Solution:

The girl in the red shirt.
As she is eating a sandwich that looks like it's years old, and that might kill her.

Solution:

No shadows.

Solution:

The man is dead and not mute.