Like accusing me of being patronizing and sarcastic (though in text conversations), when I was never anything of the sort. 

Unless it's a really , really bad accusation, I don't think your friend will need an attorney. 

He accused us not maintained the property (he should say maintain his property).

I really do not like 5 adults live in my property as there will be too much hassle and too many parties, cars, too many boyfriend/girlfriends not on lease....But do not know how to avoid them without being accused of discrimination. 

There have been people on the BP podcast that have been accused of major fraud.

It is nonetheless a recognized legal concept, and a defense to accusations of trespass.

@Wayne Brooks  without knowing details who knows whats happening.. but usually you have affirmative coverage or you have an act that your accused of that is not covered.. that as you state could be the case here.. 

I am selling this property which was purchased at a tax lien sheriff sale, I signed a contract with one of those contractor guys who buys for cash, but he is not licensed and is just trying to sell it or wholesale it on the MLS, leaving me without any word on the process, The contract said they should have started the process of the Title search and notified me within a 5 business days and notify me within 20 days of any problems with the search, they did not start the search until 15 days from signing the agreement, then i sent an official cancelation he is accusing me of breaching the agreement and want to file a lien on the property for his right to buy??

The last thing you want is for him to accuse you or a prospective tenant of stealing something from the apartment while he was gone.

By Day 60, were federal agents at the door accusing the tenant of sending child pornography through US mail because multiple envelopes with their return address had been sent to several government addresses throughout the Los Angeles area?