Help me rationalize this…

Today something weird and creepy happened. A guy, about 85 years old came to our house, rang the door bell. My husband answered and he asked for a woman by name. My husband said there is no one here by that name. The guy showed my husband a picture of an almost naked woman and said she told him to come to this address. He was pretty persistent that he expected her to be here. My husband told him to leave but before that asked him where this guy knew this woman from and how he got our address. He said on Facebook.

It was pretty creepy. The guy was a bit agitated when he was insisting to see this woman. Now we are paranoid he could come back or others might be coming.

So we found this woman’s Facebook profile and “she” is friends with the guy that came to our house. We have a suspicion we know who might be behind this prank…if you can call it that. But we don’t have solid proof.

So I’m coming here to get unbiased advice. Help me rationalize this as a scam. Why would someone like this, assuming she is real, lure a man to the wrong address? How could I get the proof that it is the person we think it is behind it?

Edit:

We did report it to police. We do have cameras and got it all recorded. So I should give a bit more info. My husband has a former friend that gets a kick out of pranking people. This guy has gone too far many times. He is vindictive, immature and quite sinister with his pranking. Its not for fun. So we think this guy is behind this incident and several other attempts to provoke my husband.

So perhaps it is a catfish situation. What does “she” or whoever it is get out of giving the wrong address? Trying to understand the scam. Or please give me your opinion…is it worth digging for evidence it is my husband’s former friend? If it is, he’s gone too far this time. It’s one thing to give out a person’s phone number to get annoyed by random calls. It’s totally different when you give an address where a family with young children live. What are your thoughts?

2nd edit:

Thank you so much for all the comments. I am considering the idea of scouting. However, we live in a very small town and it was very random and police did not suggest this had been a known issue. So it brings us back to our first suspicion of my husband’s former idiot friend. I wholeheartedly agree that his idea of pranking is not for fun but rather to hurt. He truly is a secretly evil person. If people only knew. He fakes being normal so well, it’s scary and a big part of why my husband isn’t friends with him anymore.

We have asked police to determine if the man that came to our house is a danger to us. We understand he is likely scammed and also hurt in this situation. So we have no hard feelings towards him. We also asked them to find out about tracing the origin of the messages that the old man received that had given him our address. We haven’t heard back yet.