The 24-year-old was taken into custody after attending an east London police station.
Mr Hague’s family have been informed.
A murder investigation was launched after police were called at about 8.20pm on Sunday, 5 May to reports of a fight on Corfield Street, E2.
Officers attended and found a man with a stab injury. Despite the efforts of officers and paramedics from the London Ambulance Service, 38-year-old Jack sadly died at the scene.
His family continue to be supported by specially trained officers. A post-mortem examination will take place in due course.
Anyone with information or footage is asked to call police via 101 quoting reference CAD 6482/05May. You can also call the independent charity Crimestoppers anonymously on 0800 555 111.
