Last one of these I had I got together with the administrator of the estate and we stood out front while we had them arrested for trespassing.

Your advocacy is ABSOLUTELY needed to arrest the neighborhood decline cycle.Stay engaged, follow it through, your effort is will keep petty crime away and repel even worse elements from taking root.

Simple, "get the heck out" would suffice.They could even be arrested in most states for refusing to leave.

Brandon,When we rent to anyone who is the only adult, we add the following clause and have them add a name, address, and phone:In the event of abandonment, arrest or death, the following person has the authority to decide when to terminate tenancy and how to store/distribute my belongings:May be something to consider, then you can talk about their wishes before it comes up.  

My tenants would be arrested from all the trash left behind, I'd get sued and involved as the place would be mine, the house confiscated and sold at auction to ......yes, the highest bidder!

After filing the paperwork, paying the delinquent taxes, and having the electricity turned on in my name, I was arrested for trespassing.

Should have closer to $125-150k, but ran into a crook disguised as a contractor (charges pending-warrant issued for his arrest just last week). 

Three roommates, students, dispute happens, police called, the word I get  is that they attacked each other but only one gets arrested because the other is pressing charges against her.

Have the cops actually arrested anyone on the property (associated with the unit) for drug activity, if so then you can use that to evict? 

I have tenants that are in violation of their lease through an arrest that occurred at the property.