Clue

I need some help...you see, there's been a tragic death. It seems that my dear robot-sweeper-friend, Chester has been killed. I've tried contacting Detective Monk, but apparently, with Chester no longer sweeping my floors, Mr. Monk thinks the house too unsanitary to come solve the mystery for me. He gave me some guidelines that if we follow, he will solve the mystery for us.

So here's how it's going to go:

I'm going to post a riddle...the first person to solve it gets the chance at guessing a combination of the person, weapon, and room of the crime (Monk will let us know whether that was right or wrong, but he can't tell us which one of the three was right or wrong...just how many were correct) OR they can ask if one of the people, rooms, or weapons was involved (Example, "Is Dave, the painter guilty?"). Just be careful 'cause everyone else is readint this too! At that time, I'll post another riddle, and so forth until the mystery is solved.

Of course, there's a reward to anyone who can solve the mystery of poor little Chester's death.

List of Suspects:
Dave, the painter
Sam, the piano tuner
Ed, the assistant
Cindy, the neighbor
William, the grandson
Tami, the housekeeper

Possible weapons located:
Pipe
Rolling Pin
Hammer
2x4
Candlestick
Knife

Rooms:
Listening Room
Master Bedroom
Hall Bathroom
Study
Conservatory
Kitchen
Living Room
Tami's Bedroom
Pool Deck

Riddle:

Ten pears hanging high, Ten men come passing by. Each took a pear and left nine hanging there. How could that be?

So, here goes...it's "Time to Play"!