I've discussed this with a lawyer, I am able to evict based on my zero tolerance for criminal activity addendum, but an eviction with a physically aggressive person doesn't sound like a great idea.

There are outright criminals that will take advantage of you and destroy your property given a chance.Hoping people are good is bad management.To answer your question.

I graduated from AMU with my BA in Criminal Justice and I am currently looking at getting my real estate license here in MD.

my partner got the call last week and they said her ex-husband hit a kid with his car and they want money for the medical bills because they couldn't go to the cops because they were wanted criminals so they'll take the money or shoot.

I have an applicant that may have a criminal record that was expunged. 

I want to send a notice introducing us as the new owners and giving them notice that in order to renew their lease they first must consent to a criminal, credit, and eviction screening under our new minimum qualifications/new lease terms for all persons over the age of 18 that live in the home and also inform them that rent will be increasing November giving them the chance to stay if they want  and meet our rental qualifications or decide if it's best for them to move.I want to know does this seem reasonable and if there are some things I should consider before moving forward with this plan?

For you to assume it is car theft without further investigation is naïve on your part, are you a criminal lawyer by chance ?  

Criminal and Civil. 

Make sure that you thoroughly screen your tenants in the future (i.e. pull a check on their credit, criminal, AND evictions history) and do landlord reference checks on everyone above 18 that will be living in the unit.

Also you have to be stealing power and a criminal if you grow pot, right?