Daniel Perry, 17, from Dunfermline, Fife, was trapped into taking part in online Skype conversations via a web camera with someone he believed was a girl of the same age.
A recording of the call was used to try to blackmail the apprentice mechanic before his death at the Forth Road Bridge last month.
Daniel was told that if did not pay money into a specified account the footage would be shown to friends and family.
His mother said police had taken away his laptop and established her son had been speaking over the course of several months to a girl he believed was from America.
She said: "Whoever is behind this scam has manipulated the footage. These people are clever and dangerous. I believe he didn't give them any money and I don't know how much they asked from him.
"It was webcam to webcam talk, it wasn't anything different than any teenager of that age. He was nearly a man, I couldn't go into his bedroom and ask what he was doing."
The scam operates by conning young men into thinking they are having chatroom conversations with a girl but, in fact, they are being recorded.
The blackmailers then find out personal details of their prey via Facebook and threaten to send the video to friends and family.
Police Scotland confirmed they were investigating.
Meanwhile, the website ask.fm, which was linked to the death of 14-year-old Hannah Smith, has said it will delay announcing its safety review findings as a mark of respect to Hannah because it was planned on the same day as her funeral.
l Samaritans is available 24 hours on 08457 909090