Seth Stephen Privacky (June 2, 1980 – July 15, 2010) was an American mass murderer from Muskegon, Michigan.

He pled no contest and was convicted of five counts each of first-degree murder and felony firearm charges.

He was shot and killed during a failed prison escape attempt with two other inmates at Kinross Correctional Facility on July 15, 2010.

[4] However, a family friend stated that his father believed he was a psychopath who did not have a conscience and that his mother said he was "out of control".

He also claimed that he was on LSD at the time of the shooting, and afterward vomited and had suicidal thoughts after the effects had worn off.

[5][9] Security footage showed Privacky attempting to buy .22 caliber ammunition the night before the murders.

[6][13] After his father left to pick up his grandfather at 12:45pm, Privacky shot his brother in the back of the head while he was watching TV, before dragging his body into the basement.

[13] He then waited for his father to return home, before ambushing him and his grandfather in the garage, shooting them both in the back of the head.

[3][6] His brother's girlfriend, April Boss, arrived and saw the bodies, leading him to shoot her as she walked into the kitchen.

[4][6] He disposed of the shell casings in a gas station trash can and went to the grocery store to get duct tape.

[2][3] He hid for nearly 13 hours, ultimately being found in a barn a mile from his home,[16] after a schoolmate who had given him a ride recognized him and tipped off the police.

[14] He initially claimed his dead brother had committed the murders, stating that they were the result of a murder-suicide pact between them that had gone awry.

[13][15] He was acquitted by a jury in November 1999, after his defense argued that he only helped Privacky due to fear for his life.

[18] Wallace was charged several weeks after his acquittal for vandalism he had committed between his two visits to the Privacky home the day of the murders and was ordered to pay restitution after he pleaded no contest to misdemeanor property destruction.

[8][19] He and two other inmates carjacked a correctional staff semi-truck near the prison around 9:10 a.m. (ET) and tried to drive it through the double fence, resulting in a large breach in it.