LOWELL, Mass. (AP) – Massachusetts State Police have started termination proceedings against a trooper who has been convicted of raping his former girlfriend.

Robert Sundberg was found guilty Wednesday of multiple charges, including rape, strangulation, assault and stalking.

The 48-year-old Sundberg was arrested after the victim, who is also a state trooper, reported she was attacked at his Boxborough home in April 2016. Prosecutors said the assault was the culmination of a long history of abuse.

State police say they immediately suspended Sundberg without pay after hearing of his arrest.

A state police spokesman said Wednesday they hope the verdict “proves justice to the victim,” and that the department has no tolerance for domestic violence.

Sundberg is scheduled to be sentenced Tuesday.