A Lac La Biche man is facing first-degree murder charges in connection to a homicide in late October, and RCMP believe a woman who was reported missing near Boyle is with him.

Lloyd Wesley Boudreau allegedly pulled the trigger that killed 26-year-old Michael Matthew Mountain, also of Lac La Biche, on October 28.

Mountain’s mother, Marianne Mountain, told CTV News Michael and his family moved to the house three weeks before he was killed, and that her son did not know Boudreau. Police believe Mountain was not the intended target.

Mountain's mother said her son was shot to death at his home.

“He was with his cousin, Jesse, they were up together and they were playing games and then he heard a knock at the door so he answered it, and that’s where he got shot was outside his doorstep.”

The victim left three young daughters behind.

“He was a hardworking man, he always worked – he always provided for his kids,” his mother said. “It is very heartbreaking because they took him from us and it is very awful because everybody misses him.”

Investigators believe 25-year-old Mandi Leigh Boucher from Lac La Biche she could be with the alleged killer. Police say she was reported missing to Boyle RCMP the day Mountain’s body was discovered.

 “We’re very concerned because we don’t know if she’s being held against her will,” Alannah Boucher, Mandi’s sister, told CTV News.

The sister said Boucher and Boudreau have been in a relationship for about four years.

RCMP received tips from the public about seeing Boucher and Boudreau together in Edmonton, Lac La Biche, Boyle and St. Paul.

“I don’t think my sister had anything to do with it,” Boucher said. “She wasn’t considered a suspect in the homicide.”

Police describe Boudreau as Metis, approximately 5-foot-6, 188 pounds, with black hair, brown eyes, and tattoos on his neck and ride side of his face.

Boucher is described as Metis, 5-foot-1, 150 pounds, with brown hair and green eyes.

Anyone with information about this investigation is asked to call Lac La Biche RCMP. If you prefer to remain anonymous, call Crime Stoppers at 1-800-222-8477.

“Mandi, wherever you are, please contact us,” Boucher said. “We are very worried about you; we just want to know that you are safe and that you come back to us.”

With files from Angela Jung