OZARK, Mo. (AP) — A Missouri man who used the light from a headlamp to methodically shoot and kill a pregnant woman and two other people in a mobile home has been sentenced to life in prison after admitting his role in the slayings.

Brian Williams pleaded guilty Wednesday in Christian County to four counts each of murder and armed criminal action. He also pleaded guilty to vehicle tampering and theft of a firearm.

A judge immediately sentenced Williams to four consecutive life terms, with no possibility of parole.

Authorities say Williams shot and killed Christina Winden, James Marsh, Casey Maples and Maples’ unborn daughter in February of last year.