(AP) A Maine man charged with killing his girlfriend and her two children is due to stand trial.

Jury selection was set for Monday in the trial of Keith Coleman, of Garland. Coleman has been charged in the deaths of 36-year-old Christina Sargent, 10-year-old Duwayne Coke and 8-year-old Destiny Sargent.

Investigators say the bodies were found Dec. 20, 2014, in a mobile home Coleman shared with the victims.

A court affidavit says Coleman told investigators he chased down and strangled the children because they had witnessed their mother's death.