Marcia Collins, the sister of Sean Riggs told Daybreak that she is happy that the IPCC has apologised to her family.
Last year an inquest into Sean Rigg's death found that officers had used "unsuitable force" when he died in Brixton police station in 2008.
Marcia said: "It's been a long struggle, we shouldn't have had wait five years to get to this stage."
More top news
Rights groups believe the vote reflects international disapproval of Moscow's involvement in the war in Syria.
The reopening of the investigation into Hillary Clinton's e-mails came as a shock, writes Robert Moore - could it cost her the presidency?
A quiet and calm end to month and staying frost free tonight.