To persue him criminally? 

@Dan Groveyes, go to meetups (real estate or business) and meet people in person and build a networkbut... no offense... i don't think funding an entry fee in second position is a particularly compelling investment

Use services that can validate the authenticity of documents and employment history.Require Detailed Applications: Ensure that the rental application captures comprehensive information, making it harder for fraudulent applicants to provide fake details.Conduct In-Person Interviews: Meeting applicants in person can provide additional insights into the authenticity of their application and allows you to ask follow-up questions based on the details they've provided.Utilize Professional Screening Services: Professional tenant screening services are invaluable for conducting background checks, credit checks, and criminal history checks.

If the complaint is legit, the offender will be cited and you can use that as evidence for a violation letter, termination, or eviction.Second, if the offense is real, I recommend starting with a written warning.

I think that is a fair price and that will help me with my breathing room and hopefully help pay off my place faster, or at least so I can reach 20% equity so I can stop paying $110 a month in PMI haha.I'm obviously going to be checking credit score, making sure tenant has a stable income, no criminal background, etc.

You can't run a credit/criminal without the social.

To further answer your question: the truth of is subto legal is “it depends” - now is it criminal - most likely no - but could it be illegal yes.

They are brought through criminal trial. 

We are fair housing compliant regarding animals.Our tenants’ safety and the peaceful enjoyment of their home is important to us, so we do a credit/criminal background check on all applicants aged 18+, as well as employment and prior landlord verifications.

So I get this referral from a relative about a tenant who has good credit score, no criminal history, and a good paying job.