A 28-year-old man was arrested in Milton Keynes on Wednesday, 14 September. He was interviewed and subsequently bailed pending further enquiries.
Mr Tison was shot outside a block of flats on Bruckner Street, W10, in the early hours of Tuesday, 19 July.
Police were called to the location at 01: 56hrs but found that 26-year-old Daneche had already taken himself to hospital. He received treatment but died a short time later.
Officers from the Met’s Specialist Crime Command continue to investigate the circumstances surrounding his death while providing support to Mr Tison’s family.
Seven men, aged between 21 and 27, were previously arrested on suspicion of murder. They have since been released without further action.
A post-mortem examination held on Thursday, 21 July, confirmed Daneche died from a gunshot wound to the heart. He had also suffered a gunshot wound to his back.
Anyone with information about what happened is asked to call 101 quoting CAD 597/19Jul. To remain anonymous contact the independent charity Crimestoppers on 0800 555 111.