A California man allegedly murdered his girlfriend and nearly killed their four children by driving into oncoming highway traffic and crashing into a tractor-trailer.

Cesar Torres, 31, allegedly drove the wrong way on the 101 Freeway last Thursday, leading to the deadly wreck, according to the Los Angeles County District Attorney’s Office.

“A family has been torn apart by this tragic collision that leaves four young children without their mother,” District Attorney George Gascón said in a statement.

Torres’ 26-year-old girlfriend, Aimee Garcia, was killed in the crash. Their kids, ranging in age from 1 to 7, were moderately injured, prosecutors said.

The suspect is charged with one count of murder and four counts of attempted murder.

He is expected to be arraigned Tuesday.