What should i do?

Sry this will be kind of long... Recently, I moved in with my good friend Michelle who has alot of medical problems, she had byp surgery and it went wrong causing a numerous amount of more medical problems. Because of this she is in alot of pain and has been for years so her dctor prescribed her a patch for the pain. I dont remember what the patch is called but i do know that it is 100 times stronger than morphine, it's thermal, and very dangerous. This patch can kill anyone who uses it if they havn't built up a tolerance by using it for years like Michelle whose had her dosage increased gradually. About 3 weeks ago some of Michelle's jewelry and one of her patches went missing. This patch is used as a recreational drug among drug abusers, and it's also very expsensive, about $500 for one patch that is as strong as hers, people want to get there hands on it to sell.The only people who have been at the house is my friend Nicole, so she was a suspect. (cont'd below)