Police investigating an alleged attempted murder are searching for a 35-year-old man.
Richard Frost is believed to have been at the scene of an incident in Chelmsford, Essex, earlier this month when a 17-year-old boy was allegedly run down by a BMW car and then stabbed twice.
Mr Frost is thought to be travelling in East Anglia with his partner Kay Phillips, 26, and their five-month old son.
Police say Mr Frost has a leg injury and may be using crutches.
He's 5ft 8ins tall, of medium build and has pierced ears and tattoos on his hands.
Miss Phillips is about 5ft 4in tall, with blue eyes and shoulder-length or long dyed blonde hair.
Police are urging members of the public to come forward with any information by calling 0800 0961233 or 0207 1580197
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