On top of that, Stevenson installed a keylogger on the laptop 'so we were able to log all of his keystrokes and passwords and websites that he visited'.

Stevenson said it was a few weeks before the user first began browsing the web with the laptop June 24.

The screenshots allegedly showed the thief browsing for porn videos for the first few weeks.

Towards the end of July, the teenager logged in to his Facebook account and, within an hour, he was arrested and charged with the theft, Stevenson said.

'From his Facebook account we managed to get his date of birth and school that he went to, and from there we were able to track him down,' Stevenson said.

Victoria Police confirmed the incident and said the teen was charged with theft but had yet to face court.