CBP releases timeline of deadly Border Patrol shooting

MCALLEN, Texas (ValleyCentral) — U.S. Customs and Border Protection released a timeline of events leading up to the death of a gunman who targeted the U.S. Border Patrol Rio Grande Valley Sector Annex in McAllen.

Law enforcement identified the gunman as 27-year-old Michigan resident Ryan Louis Mosqueda.

The shooting happened shortly before 6 a.m. on Monday, July 7.

As previously reported by ValleyCentral, a separate report detailed what happened between Mosqueda and his father hours before chaos ensued.

The morning of the shooting

5:29 a.m.

Mosqueda reportedly arrived at the annex building and stayed in his vehicle for approximately 15 minutes before heading towards the annex building.

He was reportedly wearing a mask, a vest resembling a body armor plate carrier, shorts, and carrying a black bag.

5:50 a.m.

A law enforcement information system specialist assigned to the annex noticed Mosqueda standing between two other vehicles in the parking lot.

As the specialist reversed into a parking space, Mosqueda allegedly raised an AR-15-style rifle and began firing.

The specialist retrieved his personally owned pistol from his vehicle and returned fire, firing approximately three bullets through the windshield at Mosqueda, and called 911 to report an active shooter.

5:54 a.m.

Mosqueda approached the front doors of the annex, firing his rifle several times at the entry doors, and attempted to enter the building.

He then drew a pistol and fired several more times at the doors and attempted to open the door, but failed to gain entry.

Mosqueda moved to another side of the building and reloaded his rifle once the police arrived and began to fire rounds.

Three Border Patrol agents working at the facility heard the shots fired and responded to assist.

Agents ordered Mosqueda to drop his rifle, but he responded by firing several bullets at the agents with his rifle.

It is estimated that Mosqueda fired dozens of rounds towards the building and at law enforcement.

5:56 a.m.

Mosqueda was pronounced dead at 5:56 a.m., shortly after agents returned fire and struck him.

The document released by CBP says Mosqueda sustained bullet fragmentation injuries on his left thigh and a bullet wound that perforated his left cheek and passed through his skull.

Agents requested emergency medical services for Mosqueda and three law enforcement personnel who sustained injuries.

A McAllen police officer reportedly sustained a wound from shrapnel to the leg.

A Border Patrol agent reportedly sustained ringing in his ears after the shooting.

The specialist who called 911 sustained glass shards in his skin.

All three law enforcement personnel were transported to a local hospital for evaluation.

Autopsy

A Hidalgo County Forensic Pathologist conducted an autopsy the day after the shooting.

Mosqueda's cause of death was determined to be a perforating gunshot wound to the head, and the manner of death was ruled as a homicide.

Agents with the CBP Office of Professional Responsibility, McAllen Field Office, were present during the autopsy.

CBP Office of Professional Responsibility, McAllen Police Department, Texas Department of Public Safety, the Federal Bureau of Investigation, and the Department of Homeland Security Office of Inspector General responded to the scene and are reviewing the incident.