A 17-year-old Stephenville woman was killed early Tuesday morning in what law enforcement officials called a “catastrophic” crash on FM 205.

Heather Michelle Williamson was killed instantly after she lost control of her 1993 Mitsubishi Mirage and was struck by a dually pickup.

The accident occurred about 1:15 a.m. when Williamson, traveling south, attempted to pass her boyfriend, Ephrain Mendoza, 19, of Stephenville, who was driving a Camaro, according to Trooper Kenneth Bratton with the Texas Department of Public Safety.

“They (Williamson and Mendoza) were having some type of argument that transferred to the road,” Bratton said. “When she tried to pass him, she lost control of her vehicle and spun out in front of a dually heading north.”

Traveling in the dually were two Tarleton State University students,  Kehl Robbins, 17, and Paul Hopson, 22. The men did not sustain any injuries.

Williamson was a 2008 graduate of Iredell High School who reportedly moved to Stephenville only recently. She and Mendoza have a six-month-old child.

Bratton said the accident is still under investigation.