My ex had been known to record our arguments on his phone back when we dated. It creeped me out. So I know he's capable of that kind of behavior...

Well, just recently, a mutual friend of ours left a few of her things at his place from the night before and he was at a club when she called and said she needed to get the things. He told her that he left the door unlocked. I dropped her off and she asked me to come in with her because she felt weird being by herself in his house (not weirded by anything with him, just felt more secure I guess). We laughed bc there was a used condom on the floor. 

Well, she left in her car and I left in mine. The next day, the ex texted me and said "were you in my home when I wasn't home?"
I said "yea, remember I had to drop your friend off to get her things?"
He was like "umm why did you go in?"

First off, this friend hadn't even talked to him since these texts came in so she never mentioned that I walked in. Second, we saw no neighbors that could have told him.  I told the friend about his texts and she thinks he has a hidden camera in the room. That freaks me out...my ex and I had sex in that room recently. I don't like the idea that I'm being recorded without my consent. Has anyone had an issue with this in the past or are we being paranoid? There's just no way that he would know that I was ever in his home before he texted me... 

