Retail Fraud / Shoplifting: Roommate Might Be a Thief

I have been living with someone for a short period of time. Recently there's been some high ticket robberies around town - mostly electronics. It's the season after all... But I've been noticing some items entering the apartment that match the descriptions of some of the stolen items. My roommate isn't really in a position to afford those things, unless they're getting money from a different source; however, it seems out of character for them and it's starting to get to be too much of a coincidence.

How should I approach this??

Should I be careful if my accusation turns out to be false?

Could I get in trouble also if I don't report?

Thank you, all.

Retail Fraud / Shoplifting: Roommate Might Be a Thief