I have heard of people setting up group homes and renting them out to ex-cons, people with down syndrome, and sex offenders.

This is very simple.You file eviction.Go to court.When you stand in front of the judge present the facts.Be emotionless when you speak and have timeline in a clear,concise,and quick manner.The judge listens to all kind of long BS all day long and when they get someone who keeps quiet and gives and quick and concise response you will stand in good favor with them.I usually let the tenant dig a big hole for themselves and it works every time.The less you can say is better.The judge has heard every excuse before and will quickly dispose of the tenant.Usually after the judgement is entered you can pay for a writ where the marshall will come and throw the tenants stuff out.Depending on how many writs they need to serve that month it could take 3 to 4 weeks to get them out.The tenants do not know the writ office is back up so most leave right away.Here if 500 or less of property is left and it appears they have abandoned the property you can re-key and throw the stuff out.Here if they do not file an answer in Georgia for the court you can get the writ but not a judgement.I would have to pursue them in small claims court then.So as you can see it is vary important to learn processes for your state.I condition tenants before they sign a lease.No drugs,smoking inside,sex offenders,felons,aggressive dogs,etc. will be tolerated.We do inspections once a month and if ANY lease provision is violated we evict immediately.Everyone of my tenants pays on time now and the others have left.It's kind of like having a slack employee trying to get away with stuff all the time versus a great employee that works hard.

You shouldn't have any sex predators, strip clubs, or liquor stores in the neighborhood.

Tenant screening came back with fairly low credit scores for both, and one is on the national sex offenders registry. 

My recommendation is that you screen tenants using a service which offers the full spectrum of reporting (job history, rental history, income verification, credit score, any adverse items as a part of their full credit history, nationwide criminal background check, terrorist list check, sex offender list check and eviction history).  

His "past" is just as damaging  to his reputation as someone who's a convicted sex offender.Just something to think about.

This was before premarital sex was invented.

The property owners have no idea if I'm a burglar (I'm not), a sex offender (I'm not), or something similar.

There is also tons of white collar and real estate crime there as well as narco-trafficking, cartel activity, violent crime, sketchy ex-pat American fugitives on the Lam hiding out, sex trafficking, etc. that gets overlooked.

Know what you are willing to "let go" of and I say that because one of my owners ended up selling because she really had a hard time letting go of the fact that guests/strangers were sleeping/having sex in the beds.