How do you beat canvas the castle on oblivion

Canvas in the castle has 5 suspects and 3 clues

Now you must investigate each of the suspects first and then you will move on to the second part of the quests: finding clues.

Here are the 3 clues and their locations:

• A suspicious painting - at the bottom of the West Tower (through the Private Quarters doors or directly through the Arch Tower), look for a trapdoor behind the crates to the left
• Suspicious paint footprints - on a rug in the dining area
• Concealed painting tools - in the lectern in Chanel's room

Then, you have enough clues to accuse someone