Can you find the answer to these riddles?

Highest Ranking #1 in Short Story... A collection of murder, theft, and other riddles. After reading these, you'll be able to say; it was Prof. Plum in the living room with the lead pipe. Do not try these at home! I have not made these up myself, I have just described it a bit more, and given a few details, yet the answer stays the same. Comment what you think!