collecting due money from evicted tenant

[Keiko Harada]

Hi all, 

I have an ex-tenant which I evicted due to their hostile behavior which threaten other tenants. They signed a stipulation to leave on certain date or they pay the court fee but they never returned the key nor left on that certain date. Also, they have damaged the place severely that I had to repair the apartment. Should I go after them with a collection agency to collect the money for the damage, court fee, and the lost month of rent? Is that possible? If so, please introduce to a good collect agency. 

Recently, this tenant contacted me to have her eviction record expunged since she was not able to rent a place due to her background check. 

thanks,