A 19-year-old woman has been arrested in connection with the murder of David Lawal in Thetford, bringing the total to 14.
Mr Lawal, a gym instructor, from Hackney, was found stabbed to death on Brandon Road in the town on Thursday, October 3.
The teenager was arrested in Bedford on Thursday, November 7 on suspicion of assisting an offender and conspiracy to supply drugs.
Detectives have been working on a number of lines of inquiry to discover what happened in the hours leading up to the murder.
An inquest was opened into the death of Mr Lawal on Wednesday, November 6 who died of stab wounds to the neck and chest.
This 14th arrest follows that of a 16-year-old boy arrested on suspicion of murder in London on October 30.
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.
Alternatively, they can contact Crimestoppers anonymously on 0800 555111 or online at http://www.crimestoppers.co.uk/
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