SAN DIEGO (AP) - The San Diego County Medical Examiner's office is investigating the cause of death of a man who collapsed in a Border Patrol holding cell on Christmas Eve after he was taken into custody for allegedly carrying three pounds of marijuana.
The Border Patrol said Saturday that the man, a U.S. citizen, was stopped at a checkpoint on Interstate 8, near the Mexican border.
He was taken to a holding cell after authorities said they found the marijuana, drug paraphernalia and traces of methamphetamine in his car.
Soon afterward he collapsed. Paramedics were unable to revive him.
Border Patrol officials say they are cooperating with the investigation.
The man's sister told U-T San Diego he was in good health. He was identified as 58-year-old Steven Keith.
Check out some of our most read stories from 2013:
#shortyellows: Florida quietly shortened yellow lights
Terrorism Warning: Memo says terrorists practicing dry-runs on Florida flights
Kittens shot: Officer shoots kittens in front of children
Courtroom apology: Woman apologizes for flipping off judge
Weird ice: Strange, giant circles appear on frozen pond
Controversial Club: College student organizes "White Student Union"
CFO Trouble: School administrative chief in trouble over her porn sex blog
Warning Shot Wife: Mother gets 20 years for firing warning shots at abusive husband
Science Arrest: Teen girl arrested over science project explosion
Wait, WHAT?? Dog shoots man in the leg with a handgun
Popular photo galleries:
Faces of Meth: Devastating before and after photos of meth abusers
Trayvon Martin Shooting: Trayvon Martin crime scene photos and George Zimmerman injury photos
Hooters Winners: Winners of the 2013 Hooters swimsuit pageant
Rejected: Funny Florida license plates rejected by the DMV***warning graphic***
Deadly sinkhole: Home collapses, man dies in giant sinkhole
Florida Sex Offenders: Look up sex offenders in any Florida neighborhood here
Restaurant Inspections: Look up inspection reports for any Florida restaurant here
(Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)