A third 16-year-old boy has been arrested over the fatal stabbing of a man in Birmingham.
Hazrat Umar, 18, was found fatally injured in Norwood Road, Bordesley Green on 25 February.
West Midlands Police said a 16-year-old youth was arrested earlier on suspicion of murder and was in custody.
Another boy, aged 16, was charged last month with murdering Mr Umar and a different 16-year-old arrested on 6 March has been released without charge.
Mr Umar, a South and City College Birmingham student who lived in Bordesley Green, was a relative of the former chief prosecutor for North West England Nazir Afzal.
Det Insp Michelle Allen from the force's Homicide Team, said: "There is a lot of work going on to get to the bottom of what happened and to identify the people responsible for Hazrat's death.
"My thoughts remain with Hazrat's family who are devastated by this senseless act. We're doing all we can to bring those responsible to justice."
Officers have used stop and searches after West Midlands Police Chief Constable Dave Thompson said knife crime was "an emergency".
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