Investigators from the Lafayette Police Department, the FBI and Boulder County's bomb squad spent more than seven hours Thursday searching the Boulder home and surrounding neighborhood of a 16-year-old accused of planting a device similar to a pipe bomb at Centaurus High School last week.

Lafayette police Cmdr. Gene McCausey said investigators arrived at approximately 8 a.m. Thursday to execute a search warrant on the house where the suspect -- who has not been identified because he is a minor -- and his family live in the 4900 block of Valhalla Drive in north Boulder.

In addition to searching the house, investigators also combed the surrounding neighborhood for evidence, he said.

Bomb squad vehicles and dogs took part in the search, McCausey said, but there was no emergency, and their presence was part of a thorough follow-up investigation. Forty law enforcement officials took part in the search, officials said.

McCausey could not say whether investigators recovered any new evidence related to the case.

The teen suspect, who remains held in juvenile detention, is due in court Friday to be formally charged in the case -- possibly as an adult. He faces charges that include two counts of possession of incendiary materials, felony menacing and interfering with an educational institution.

The suspect's father declined to comment on the case when contacted at his home Thursday evening.

Boulder County District Attorney Stan Garnett said his office is reviewing the case to see whether the suspect should be charged as an adult. An investigator with Garnett's office also was on Vahalla Drive speaking with neighbors Thursday.

The large collection of law enforcement vehicles and trailers involved in the search lined the quiet, rural residential street, part of a neighborhood bordered by Boulder Reservoir on the east and sparsely developed, grassy hills in every other direction.

Neighborhood resident Roger Walker said he and his family have lived a few doors down from the suspect's home full time for almost a year, but haven't interacted much with the teen or his family. Walker said the family members seem to keep to themselves, noting he did not see them at neighborhood gatherings attended by he and other residents last summer.

While Walker was not home during much of the time investigators were on the scene Thursday, he said his wife told him investigators were "all over the pasture this morning."

Other neighbors said investigators asked them whether they had seen or heard anything they deemed suspicious coming from the area of the pasture.

The explosive device at Centaurus, which police described as being "very similar to a pipe bomb," was found May 13 by a teacher inside the school, forcing its evacuation and the closure of South Boulder Road for several hours.

Officials said the device had a 9-volt battery and could have hurt those in close proximity had it exploded. The device was detonated by the Boulder County bomb squad away from the school.

The teen was arrested later that night at his parents' house, where police said further evidence linked him to the explosive device discovered in the school.

Contact Camera Staff Writer Joe Rubino at 303-473-1328 or