FORT LAUDERDALE, Fla. -- Authorities said a South Florida teen committed suicide in front of a live online webcam audience after blogging about his plan to kill himself.

Broward County medical examiner's office investigator Wendy Crane said Abraham K. Biggs, 19, died Wednesday from a toxic combination of opiates and benzodiazepine, a drug used to treat insomnia and depression.

About 1,200 people watched as Biggs overdosed on Justin.tv, a live video streaming Web site.

Crane said some of those watching tried to talk him out of it, and a few were debating whether the dose he took was lethal. Crane said someone notified the moderator, who traced the teen's location and called police. Biggs was dead by the time they got there.

Crane said he was just seen lying on the bed at that point, his head facing away from the camera.

Viewers saw an armed Pembroke Pines police officer enter his room, followed by a paramedic. The officer peers over to look at the man, then begins to examine him as the camera lens is covered and the feed ended.

On a body building Web site, Biggs wrote, "Please forgive me all for taking my own life so early. I tried so hard to fight against this strong battle ... I have reached out for help so many times, and yet I believe, I was turned away because of the things I did, that it is a punishment I am willing to take, for I know that being who I am has only brought myself and others pain."

Condolences poured into his MySpace page, where the mostly unsmiling teen is seen posing in a series of pictures with various young women. On justin.tv, his alias was "feels--like--ecstacy."

Biggs' father, Abraham Biggs Sr., told ABCNews.com that he was not home when his son died. He said his son struggled with depression and had been prescribed benzodiazepine to treat bipolar disorder. Biggs had been "doing better," his father said. "He was a good kid."

The elder Biggs said he was upset that Justin.tv streamed his son's suicide live.

"There seems to be a lack of control as to what people put out on the Internet," the elder Biggs said. "There's a lot of garbage out there that should not be, and unfortunately this was allowed to happen."

In a statement, Justin.tv CEO Michael Seibel said: "We regret that this has occurred and want to respect the privacy of the broadcaster and his family during this time."

The Web site declined to release information on exactly how many people were watching the broadcast. The entire site had 672,000 unique visitors in October.

The family is also trying to understand why those online viewers waited for hours to notify authorities.

Biggs, who used the screen name "CandyJunkie" on a bodybuilding Web site, started blogging about plans to kill himself 12 hours before he was found lying dead on his bed. He posted a link from bodybuilding.com to Justin.tv, a site that allows users to broadcast live videos from their webcams.

Some users who read the blog told investigators they did not take him seriously because he had threatened suicide on the site before.

But Biggs' family was infuriated that neither viewers nor the site acted sooner to save him.

"When (police) came in, the webfeed stopped. So that's 12 hours of watching," said his sister, Rosalind Biggs. "They got hits, they got viewers, nothing happened for hours."

Rosalind Biggs described her brother as a friendly, social, outgoing person who struck up conversations with Starbucks baristas and enjoyed taking his young nieces to Chuck E. Cheese.

"It boggles the mind," she said. "We don't understand."

Messages left with the body building Web site were not immediately returned Friday. A spokesman said Pembroke Pines police are investigating but declined further comment.

Crane said she knows of at least one other case in which a South Florida man shot himself in the head in front of an online audience, although she didn't know how much viewers saw.

In Britain last year, a man hung himself while chatting online.