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Pleasanton Police Sergeant, Maria Munayer briefs the press on Tuesday, Sept. 24, 2013, about the beating of a Pleasanton Calif. resident early Sunday morning by suspects that had gathered outside his home on a dead end street on Middleton Place and beat him into a coma when he confronted them about their noisey gathering. (Jim Stevens/Bay Area News Group)

PLEASANTON -- A group of teenagers were deemed persons of interest Tuesday in the attack on a 51-year-old Pleasanton man, who was knocked into a coma early Saturday when he was investigating a noise outside his home.

Police did not identify the teens or give their ages. An official with the Pleasanton Unified School District said at least one of the teens being questioned was a district student but did not know what school they attended.

David Lamont, founder of Pleasanton-based marketing agency Marketsage, was home with his wife and two teenage daughters Friday evening when he heard loud voices coming from a field at the end of Middleton Place, a cul-de-sac of million-dollar homes southeast of Bernal Avenue. Teens often gather on the grassy hillside, part of Bonde Ranch Open Space, neighbors said. Lamont reportedly went outside just before midnight to confront the noisy group.

Police are trying to determine who attacked 51-year-old David Lamont.
Police are trying to determine who attacked 51-year-old David Lamont. (Courtesy ABC7 News)

When he did not immediately come back inside, Lamont's wife went outside and found him lying in the street, breathing but unresponsive, Sgt. Maria Munayer said. Lamont was taken to Eden Medical Center in Castro Valley, where he remained in critical condition Tuesday.

Investigators, unable to interview Lamont, were reviewing video surveillance in the neighborhood and are asking the public for any information they may have. One witness told police a dark-colored SUV left the neighborhood shortly after the attack.

"We want to resolve this, and we are actively investigating it," Lt. Scott Rohovit said as police were interviewing the group of teens Monday. "We need to get to the bottom of this, to find out who did this."


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Nicole Steward, assessment coordinator for the Pleasanton Unified School District, said police have not told them which students in the district are their persons of interest, only that the group consists of teens from both Pleasanton and another nearby school district.

"Even if we do find out who these students are, this was not a school issue," Steward said when asked about possible administrative action. "This is more a parent and community issue. The police are obviously going to do what they are going to do, and we are cooperating fully with their investigation."

Munayer said police investigators are "actively soliciting tips from the community" on any viable tips they may have.

Anyone with information about the case is asked to call Pleasanton police at 925-931-5100.

Contact Erin Ivie at eivie@bayareanewsgroup.com. Contact Natalie Neysa Alund at nalund@bayareanewsgroup.com.