Byron Smith Update: Minn. man indicted on first-degree murder charges in Thanksgiving day deaths of two teens

This Nov. 23, 2012, photograph provided by the Morrison county sheriff's office showsByron David Smith. The Morrison County man has been arrested after he told police he shot and killed two teenagers who were allegedly breaking into his home on Thanksgiving Day.
Morrison County Sheriff's Office
Byron Smith
Morrison County Sheriff's Office

(CBS/AP) MINNEAPOLIS - Byron Smith, a Minnesota man accused of killing two teenagers who broke into his home last year, has been charged with first-degree murder.

PICTURES: Two Minn. cousins fatally shot on Thanksgiving Day

A grand jury indicted Smith under seal Wednesday on two counts of first-degree murder with premeditation. The new charges were announced Thursday.

The 64-year-old Smith initially was charged with two counts of second-degree murder in the Thanksgiving day 2012 deaths of 17-year-old Nick Brady and 18-year-old Haile Kifer.

In Minnesota, a first-degree murder charge must be issued by grand jury indictment.

If convicted, Smith faces a mandatory penalty of life in prison without parole.

Prosecutors say Smith shot the teens multiple times and left their bodies in his Little Falls house for a day before authorities were notified.

One of Smith's attorneys, Adam Johnson, says Smith was acting in self-defense.

Complete coverage of Byron Smith on Crimesider