A TEENAGER committed knifepoint robbery.

Jordan Ash, 18, of no fixed abode robbed Sydney Costello of a silver necklace in the Old Steine Brighton on May 7.

Ash was in possession of a folding pocket knife at the time of the robbery.

Ash had pleaded not guilty but was found guilty at Brighton Magistrates' Court on Monday.

He was ordered to reappear before Worthing Magistrates' Court tomorrow.