Solution:

It is not Richard because if it was, Richard 1 and Morgan 3 would both be false, which would make Richard 2 and Morgan 2 both true which is a contradiction.

It is not Travis because if it was, Travis 1 and Travis 3 would both be false, which is not possible.

Therefore, the killer must be Morgan.

Solution:

10

Explanation:
Equation 1 + 9 + 11 = 1 can be derived from
One (o) + nine (n) + eleven (e) = one => 1

Similarly for equation,
12 + 11 + 9
Twelve (t) + eleven (e) + nine (n) => ten (10)

Solution:

2 minutes (duration between 9:59 and 10:01)

Solution:

She is near the trunk of the tree as shown below.

Solution:

I am Spice

Explanation:
Spice is hot if you remove first two alphabets then it will become "ice", which is really cold.

Solution:

If you take a look closely, you will acknowledge the fact that every symbol in the given figure is somehow associated with the surrounding one’s position. The upside-down spade is used to the left of a right-side-up heart every time.

Solution:

If you see the picture, they formed a pentagonal shape and achieved the required.

Solution:

It can surely be true because it is not mentioned that it was raining.

Solution:

The woman told him to take out one nut each from the rest of the wheels and use them.

Solution:

See the figure for the answer. Wasn't it a bit tricky?

Solution:

Pages 19, 20, 23, 37, 38, & 42 will also be missing