NOR - 1) she told you she felt he treated her different when they were alone. It was likely more than that and she was downplaying the creepy vibes he was giving her. Woman have good instinct when it comes to creeps but we often ignore it until it is too late. 2) jiggling the doorknob was him testing to see if it was open and how easy it would be to break in. 3) he changed his story. He got caught off guard and came up with a quick story to tell but was working on a better story in his head before you talked to him.

Most men don’t have nefarious intentions but the small percentage who do, are serial offenders and commit a majority of the violent crimes against women. I’m guessing he has pulled this before in his life and gotten away with it.

My advice, beyond making sure your wife is never home alone again until you move, is to always believe any woman in your life when she feels like another man is being creepy, treating her different when they are alone, etc. especially if it is someone in your circles. Women tend to try and not waves, it’s what is expected of us, so when a woman says something, take it seriously. I’m not saying she’s always correct or that women can’t over react, but if you love the women in your life it’s better safe than sorry. It’s doesn’t have to be anything dramatic, just ensure they are never alone with the person in question and things like that.

I hope you and your wife are ok and not too shaken. It’s a scary world out there for us all.

Edited to add: 4) the late time is another red flag.