Bedbugs in a tenants home

[Nathan Waters]

My tenant just texted me that he found bed bugs in the house. There are no carpet or upholstery in the home that were supplied by me. He has been in the house over a year. What is my level of responsibility. From what I have read, he must have introduced them with his furniture or clothes. Can I tell him to move out and get rid of his contaminated furniture? He's on a month to month lease now. He is also a section 8 tenant. Any advice is appreciated.