Tenant took a roommate

[Heidi M.]

My tenants roommate moved out and he took another roommate and let him move in before the verbally agreed upon move in date. I gave the new roommate a lease to sign (and I required a co-signer). The tenant signed the document but still no co-signer signature or deposit. I am getting the run around on the deposit. Question is do I need to proceed with eviction on the roommate or can I just tell him to leave? He’s completely moved in all his furniture but has been there only for a few days. Btw. I am dealing with college students.