My roommate (not on the lease) has been paying full rent on my behalf directly to the landlord, as I've been out traveling for the last few months. I advised my roommate that I will be moving out at the end of lease term and he had no problem with it, agreeing to move out as well, which he did 2 months early. A week before the end of lease I found out that my roommate had a guest staying with him, which I had no idea about. The problem now is that my roomate is gone and I can't find him, his guest (I don't know if she paid any rent or not to my roomate) does not want to move out, claiming that she lived there and paid rent to my roomate. It's a mess, but I want her out of the appartment as I did not get into any contracts with her, I don't know her and I never met her. If she does not move out by the end of the week, the landlord probably will keep me liable for that (I already explained to my LL about this problem). Could you advise if calling a police will solve this problem or may be changing the locks will help? I tried to ask her nicely, but she is telling me that she can't find a new place to live. The appartment is in NY. Thank you.