can a landlord cancel lease after signing?

[Heshan Abeywickrema]

Hi all,

I signed a lease for new tenants starting (7/18). There were a few question marks in the application but i decided to approve since both of the applicants were teachers and the one of them had a teenage child. The criminal background check came up clear but I found out that the male tenant had case against him that caused him to loose his job at the school due to inappropriate behavior. I unfortunately signed the lease without asking for paystubs especially since the female tenant is just starting her job this week. They paid first months rent via paypal saying that my zillow rental portal is having issues. They are yet to pay the deposit. Can I terminate the lease and pay him back? I used to live in the property and are in very good terms with the previous neighbors, and don't want to risk anything given the shady past/current behavior from the tenants. 

Thanks in advance.

Heshan.