Jonathan Roman MacLagan, 20, was shot and killed after intervening in a conflict between two rival tagging crews at a house party in a Denver suburb on December 17, 2006. According to reports, members of one crew were denied entry; as they left, a shotgun was fired from the rear of an SUV and a shot struck MacLagan in the head. He was found on the front lawn and pronounced dead at the scene. Another person was wounded but survived.

The Jefferson County Sheriff’s Office identified a suspect within days. Eighteen-year-old David Miera Jr. was arrested five days after the shooting; during questioning he admitted firing the weapon and said MacLagan was not his intended target. Miera Jr. was later tried, convicted of first-degree murder, and sentenced in April 2009. MacLagan’s family and friends remember him as a peacemaker who stood up for others.

If anyone at the party or with information about the crews involved can help fill in details about that night, please share what is known.