Son Believed Responsible for Mission Viejo Family Murder-Suicide

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The four people killed during an apparent murder-suicide in Mission Viejo earlier this week were identified by authorities on Thursday.


Four bodies were found in a home on the 25600 block of Pacific Hills Drive on May 27, 2014. (Credit: KTLA)

The bodies were discovered inside a home in the 25600 block of Pacific Hills Road (map) on Tuesday by a relative who then contacted authorities.

The victims were identified as Mark Harrison Sheer, 55, Lydia Ann Sheer, 54, Michael Harrison Davis Sheer, 21, and Amy Joanne Sheer, 15, all of whom were related and lived at the home, according to a news release from the Orange County Sheriff’s Department.

Evidence found inside the home has led investigators to believe that Michael Sheer used a shotgun to kill his father, mother and sister before turning the gun on himself, Lt. Jeff Hallock of the Sheriff’s Department stated in the news release.


Michael Harrison Davis Sheer, 21 (Credit: DMV photo)

Deputies patrolled the Pacific Hills Road area in the early morning hours of May 26 — the day before the bodies were discovered — after someone reported hearing gun shots and a man yelling in the area, Hallock stated.

After spending several minutes in the neighborhood, deputies did not find anything to substantiate the report, Hallock stated.

Investigators have yet to identify a motive for the apparent murder-suicide, according to the news release.

Mark Sheer was a financial services consultant and took part in prison ministries, according to the pastor at Mount of Olives church where the family was said to be very active.

A service was held Tuesday night at the church for the family.

Anyone with additional information was asked to call the Sheriff’s Department at 714-647-7055.

Anonymous tips can be submitted to Orange County Crime Stoppers at 855-847-6227 (855-TIP-OCCS).


Mark Harrison Sheer, 55, and Lydia Ann Sheer, 54. (Credit: DMV photos)