AN American man has filmed the violent row that broke out when he confronted another man who allegedly stole his iPhone.
Kenneth Schmidgall (26), a construction worker from San Diego, became something of a vigilante after the phone was taken at a reggae concert on December 28.
They then spent hours tracking the phone's signal - until they realised it led to a man riding a bicycle.
“I saw the gentleman on the bike and we followed it and kept tracking it and every time [the tracker] would stop, the guy on the bike would stop,” Schmidgall told ABC News 10.
With a hand-held camera rolling, they followed the man, losing him three times before they eventually caught up with him and violene broke out.
Schmidgall can be seen getting hit in the face in the footage and claims the alleged thief pushed his face while holding a rock.
The two continued to fight for 18 minutes - pushing and trying to knock the other to the ground - until Torkelson said he pepper-sprayed the man and attempted make a citizen's arrest.
An off-duty police officer then approached the men and pinned him on the ground until authorities arrived and took him away.
“It's not the phone that's so much important. It's that people get away with this kind of stuff all the time with cellphones being stolen,” Schmidgall said.
Torkelson said the alleged thief was taken into custody for outstanding warrants, although police have not yet confirmed this.