WACO, Texas (AP) — Authorities say a Central Texas college student has been arrested on a murder charge for fatally shooting another student at an on-campus rental home.

The Waco Tribune-Herald reports that 20-year-old Taylor McKibben was arrested following the Sunday shooting death of 30-year-old Samantha Dragoo. Both were students at Texas State Technical College in Waco.

An affidavit says McKibben called 911 and told dispatchers he had shot Dragoo with a shotgun after a two-hour argument over their relationship. The affidavit says McKibben told authorities he shot Dragoo after she threatened him with a hammer.

Court records don’t list an attorney for McKibben.

The college says Dragoo was a U.S. Coast Guard veteran, the mother of a young son and was studying avionics at the school.