If the tenant fights the eviction hard or you believe they might try to break back into the house I would recommend being onsite when the eviction takes place, and with the police as a witness, giving a formal trespass notice.  

Also, if he doesn't stop after numerous times being told to stop, am I able to call the police on him for having drugs or smoking in my home?

Let the police do their work regarding the eviction.

The police interviewed the tenant and he told him that I gave him the beds.

She lets out her dog as well as a few MFs goes completely insane screaming at the top of her lungs, complete lack of regard for being neighborly threatens to call the police.

Contact the police and find out the situation.

Once you have ownership it may be as easy as having the police remove him or issuing a No Trespass Notice on him.In discussions with legal or police do not ever refer to him as a tenant.

An hour later the police call me because he thought I let myself in to deliver the notice.

This was in the end of June and on Oct 8, he called the Police Dept to file a report that his garden tools were stolen and he said that I purposely had someone come in to take his things to harass him.

There's a stigma, I guess, because they're police dogs and were bred to have the capacity to be aggressive, but unless you raise them to be aggressive or you suck as a pet owner they're the most loving breed I've ever had.Now, there's the problem -- most people suck as pet owners, and I realize this as a future landlord.