@Aly W. It's

At wits end, I send him a 7 Day Letter letting him know I am booting him and he pays.  

I would plan on exploring this from either Sheetrock wall on opposite side of opening up the wall from the tiled surface in the bathroom.You probably will not be able to keep the deposit in this case, and as you mentioned it was a 2 "flat" I am assuming you're in the greater Chicago metro and your L & T laws are very strict there.I would do as another post suggested and either have it repaired by current owner prior to closing to your satisfaction - meaning you are physically on the job site to witness extent of damage or lack there of due to water, or, renegotiate and ask for a concession for the issue - and this could be a moderately expensive problem depending on the length of time it has been leaking and given the possible location of the shower/bath to supporting wall etc should lumber need to be replaced.

Originally posted by @Jerry Bruckenheimer :Fico scores factor both open and closed accounts and the age of your credit file (AAoA) is 15% of your Fico score.My credit expert is an expert witness and consultant to legislators.

The existing tenant witnessed a transaction take place out front of the building.Those are all the details I have.Should he confront the new tenant?

Have the police test it (the area if tenants removed it by now)file a reportask about witness protection (who knows what dealers are capable of!)

Also, the leases will be signed electronically by the tenants but I have to have two witnesses so I plan to print and sign them here at home then bring the perfected copies to the property tomorrow.My main question is, how and when do I collect the initial payments?

Were there witnesses outside of your family?

Do you have any emails or witnesses?

Send them a notice about the condition of the property and odors you witnessed.