An inmate doing time at an Oklahoma prison says he was forced to have sex with a female case manager “50 to 100 times” beginning in January 2010, a lawsuit filed by the prisoner's attorney claims.

The suit, filed Aug. 13 against the state Corrections Department, claims Kasey McDonald also provided the inmate with cellphones and marijuana to sell behind prison walls while she was working as his case manager.

Filed by inmate Philip Thomas Burris Jr., the lawsuit is second such action taken against the Corrections Department in the past month.

In July, a group of women filed a lawsuit against the agency and numerous others, claiming they had been systematically abused by guards for years and that prison administrators did little to nothing to stop it.