Police in Essex say they are no longer looking for Alfie Pollard in connection with a murder investigation which was launched after a man was stabbed to death in Leigh on Friday 26 February.
Last night officers arrested a 17-year-old from Leigh on suspicion of murder.
Police also arrested two other people and one boy in connection with the investigation.
A 20-year-old woman from Westcliff was arrested on suspicion of assisting and offender.
A 20-year-old man from Southend was also arrested on suspicion of assisting and offender.
A 17-year-old boy from Kent was arrested on suspicion of assisting an offender and theft of a motor vehicle.
All four remain in custody this morning.