SAN FRANCISCO -- A New Mexico football player's saggy pants led to his arrest at San Francisco International Airport, police said.

Sgt. Michael Rodriguez said 20-year-old Deshon Marman, a safety for the Lobos, was boarding a flight Wednesday to Albuquerque, N.M., when a U.S. Airways employee noticed his pants were "below his buttocks, but above the knees, and his boxer shorts were showing."

Rodriguez told the San Francisco Chronicle that the employee asked Marman to pull up his pants, but he refused. She then asked him to leave the plane.

U.S. Airways spokeswoman Valerie Wunder says the airline's dress code forbids "indecent exposure or inappropriate" attire.

The officer says that after 15 minutes, Marman got off the plane and was charged with trespassing, battery and resisting arrest. He was being held on $11,000 bail, according to the newspaper. His arraignment is scheduled for Thursday afternoon.

"He was not threatening anybody directly, but being on board an aircraft and being disruptive to the aircraft crew interferes with their duties and that could be a safety factor," Rodriguez told KGO-TV in San Francisco, which is an ABC affiliate.

Marman's mother, Donna Doyle, told the newspaper that her son had attended a funeral for one of his high school teammates and he was still in an emotionally raw state.

David Henderson, his friend and former teammate, died earlier this month after being shot multiple times in the head and back on May 26. Eleven days later the 21-year-old Henderson was taken off life support. No arrests have been made in the case.

Marman grew up a block from Henderson and the friends also attended City College of San Francisco together. Marman transferred to New Mexico, but Henderson had returned to San Francisco after a short stay at the University of West Georgia.

At Henderson's funeral, Marman said he hoped to one day play in the NFL to honor his friend's memory. Doyle said she had wanted her son to leave the area soon after the funeral.

"I didn't want him to stay here in the city because of what happened to David," Doyle told the newspaper. "A lot of it is jealousy. These kids are trying to make it, they're going off to college and other people get jealous."

Information from The Associated Press was used in this report.