An 18-year-old from Ladywood has pleaded guilty to robbery and having an imitation firearm with intent.
Kareem Khan is sentenced to five years in a youth offenders institute after the victims of the crime tracked him down on Facebook.
Khan robbed a property in Winson Green in April before being confronted by three occupants of the premises. He then pulled out an imitation firearm and fled.
Khan was identified by one of the victims who recognised him from their school days.
The family were extremely brave throughout their ordeal and through their dogged determination helped us catch the culprit.
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It comes as figures show there has been a rise in trespassing in the last three years across the West Midlands.
“He is thoroughly ashamed and was a very lonely man at the time he committed these offences"
The figures have been released by British Transport Police.