FARMINGTON — After an extensive search into the night, police have not located an autistic teenager who went missing Sunday evening in north Farmington.

The boy's family contacted police at about 5 p.m. to report that their 17-year-old son, Travis Brown, was missing, and they could not find him after searching the neighborhood.

Brown is described as 6 feet 3 inches tall and 140 pounds. He was last seen wearing a gray hat, a blue shirt with a Captain American emblem on it, black dress pants, black dress shoes and a gray baseball cap.

Because of the boy's disability, police conducted a broad search, said Farmington police Sgt. Kent O'Donnell.

“I am concerned for his welfare because of his disability and that places him in what we consider the missing and at-risk (category),” O'Donnell said.

Police initially searched Brown's neighborhood near Dustin Avenue and Sunrise Parkway. Just before 6:45 p.m., Farmington police organized a more widespread search with assistance from the Farmington and San Juan County Fire Departments, the San Juan County Sheriff' Office and its air support unit, and Emergency Medical Services crews.

Brown is a Farmington High School student. His family told police there was a disagreement in the home over Brown's grades on Sunday and he left the home and didn't return Farmington police Lt. Taft Tracy said. 

Crews conducted a detailed search of Brown's neighborhood and areas the family suspected the boy may have gone. Several sightings were reported, O'Donnell said, though the boy was still missing as of 10 p.m. Sunday.

O'Donnell said police believe he may have walked on foot on Piñon Hills Boulevard toward La Plata Highway to get to a friend's house.

“The working theory is that he's looking for his friend on La Plata Highway, and we're following up,” O'Donnell said. “Our concern is he may have asked for a ride from somebody and gave them a place where he thought he needed to go, but it was obviously not where he's supposed to be.” 

Police received a tip that Brown was scene near the Sundial gas station, 1241 Highway 170, on Sunday evening, Tracy said.

Until nightfall on Sunday, the sheriff's office helicopter searched several areas, including from Choke Cherry Canyon to Piñon Hills Boulevard; the neighborhood west of Piñon Hills Boulevard and Dustin Avenue; and the neighborhoods along La Plata Highway from Main Street to four miles north of Piñon Hills Boulevard.

An emergency notification system alerted about 100 residents in the immediate vicinity of the boy's home about his disappearance.

About 50 emergency services personnel — including nine fire units and two EMS units — assisted in the search.

“It was very extensive,” O'Donnell said. 

The search continued on Monday. Detectives and school resource officers plan to speak with Brown's friends and people he may have contacted. 

Tracy said officers will also search Glade Run Recreation Area and other rural areas on Monday. 

Anyone with information about the Brown's whereabouts is asked to call Farmington Police at 505-324-6622.

Magdalena Wegrzyn is the city editor for The Daily Times. She can be reached at 505-564-4632 and mwegrzyn@daily-times.com. Follow her @maggiewegrzyn on Twitter.