On Wednesday, he went to the forum and detailed the amount of drugs he was going to take.
A police officer with his gun drawn was seen entering the bedroom to find Abraham's lifeless body.
The teenager used the 'lifecasting' website Justin.tv, which is designed to let users share their everyday lives and stream - or broadcast - live footage.
Biggs's friends have posted 'RIP' messages on his My Space page, with some still asking him to pick up his phone, and others changing their statuses to 'devastated'.
The teen described himself as a 'good hearted guy' on his social networking profile.
Eventually as many as 1,500 signed on to see the desperate act - with some urging him to hurry up, apparently believing it a hoax.