A police affidavit does not give a motive for the Friday shooting of Mark Vickerman, 55, in Minot.

His son, Christopher Alan Vickerman, 28, is charged with Class AA felony murder in district court in Minot and faces up to life in prison without parole if he is found guilty of the charge. Christopher Vickerman made an initial appearance before Judge Doug Mattson on Monday. Mattson ordered Christopher Vickerman held without bond and set a preliminary hearing for June 20. A public defender has been appointed to represent Christopher Vickerman. Ward County State’s Attorney Roza Larson also asked for an order banning Christopher Vickerman from contact with his mother and two sisters.

According to the affidavit filed with the court, Christopher Vickerman called police at 3:44 p.m. on Friday to report that his father had been shot at his father’s northwest Minot residence.

When police arrived, Christopher Vickerman was sitting on a bench outside the door.

There was security video recovered from inside the residence that showed the elder Vickerman going to the front door, opening it, and then falling backward down the stairs. The elder Vickerman was shot at 1:59 p.m. Friday, according to the home security video.

The assailant is then seen on video stepping into the foyer of the home and picking up bullet casings. The assailant was wearing shoes with white bottom soles like those worn by Christopher Vickerman when police responded to the scene.

According to the affidavit, Christopher Vickerman told police he had been working all day except when he left for lunch and told them that he had gone over to his father’s house to sell him a gun.

Video from Christopher Vickerman’s worksite shows him leaving one time at 11:41 a.m. and returning at 12:41 p.m. and then leaving a second time at 1:31 p.m. and returning at 2:05 p.m. Other video from surrounding businesses shows that Christopher Vickerman’s vehicle was in the area of his father’s house at about the time of the murder.

An autopsy is scheduled this week in Bismarck, according to Minot police.