Read official Chargers statement.

CLICK HERE to listen to 911 call from Seau's home WARNING: GRAPHIC.

The 911 call was released three days after the former Chargers linebacker shot himself to death in his Oceanside home. The call was made by a woman who identified herself as Seau's girlfriend who returned to the home after going to the gym Wednesday morning, May 2nd.

This video taken two weeks before his death.

Deputy Medical Examiner, Dr. Craig Nelson, said Seau died from a self inflicted gunshot wound to the chest. The manner of his death has been officially ruled a suicide.

Nelson said the M-E's office is now awaiting the family's decision regarding the study of Seau's brain for repetitive injury by researchers outside of their office. He also said upon completion of their work, the body will be released to the family.

Junior Seau's suicide on Wednesday comes as more than 1,200 former professional football players sue the NFL, saying the league concealed a link between concussions and what one top expert calls "mental disease" in players.

For Seau family friend Joe Gallagher, it was a comment Seau made recently that almost went unnoticed. "Junior had wanted to donate his brain to science to the study of concussive injuries," said Gallagher. Seau's death follows that of former Pittsburgh Steeler Terry Long, former Atlanta Falcon Ray Easterling and former Chicago Bear Dave Duerson. Duerson also wanted to donate his brain to science. He left a suicide note talking about his desire to learn more about football-related head injuries. Like Seau, he shot himself in the chest.

"There's no question in my mind that is directly linked to brain injury," said Dr. Daniel Amen, a Newport Beach brain doctor who has studied NFL brain injuries and is convinced suicide and brain trauma are linked. His analysis supports a BostonUniversity study which found at least 20 retired NFL players with brain disease after they finished their careers. Amen treated more than 100 former NFL players and said a brain injury can be rehabbed like other injuries.

"What we see is 80 percent of our players show high levels of improvement after just a couple of months," he said.But Duerson, Long and Easterling never got help. The medical examiner's report said Long's history of brain injury was "a significant factor" in his death. When Easterling shot himself, his wife described him as being badly damaged – both physically and mentally – from his playing career. Gallagher said he never saw those signs in his friend. "If you had told me this weekend when I saw him, I wouldn't have believed it," he said.

Hundreds of people have been coming by and leaving flowers and hand-written messages in front of Seau's home as the San Diego community mourns his death.

Oceanside police chief Frank McCoy said Seau's girlfriend found him in a bedroom unconscious with a gunshot wound to the chest. Seau could not be revived. A handgun was found near his body. McCoy confirmed that Seau's death is being investigated as a suicide.

Oceanside police responded to Seau's home in the 600 block of South The Strand shortly after after a 911 call came from the home. Pastor Miles McPherson of The Rock Church arrived at the home before  to be with Seau's family.

Seau was drafted fifth overall in 1990 by the San Diego Chargers. He played college football at the University of Southern California. He was a 10-time All-Pro and a 12-time Pro Bowl selection. Seau also played for the Miami Dolphins and the New England Patriots.