Another teenager has been arrested in connection with the murder of David Lawal.
Mr Lawal was found dead with stab wounds to the chest and neck in Brandon Road, Thetford, on Thursday, October 3.
A 17-year-old girl has been arrested in Haverhill, Suffolk, on suspicion of assisting an offender and conspiracy to sell Class A drugs in connection with the gym instructor's death.
The teen has been brought to Norfolk for questioning.
This brings the number of people arrested in connection with the death of the Hackney man to 15.
Detectives have been working on a number of lines of enquiry to build a comprehensive picture of what happened in the hours leading up to the murder.
The arrest follows that of a 19-year-old woman in Bedford.
Anyone with information should contact Norfolk Police on 101 and quote reference Operation Petersfield and a member of the enquiry team will call them back.
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