I've seen this same report before - I think even on the same website.
Doesn't provide a whole lot of details or sources. Know of any other links with more info?
I don't doubt the info though. The gangs led by Ismet Bajramovic (Celo), Jusuf Prizina (Juka), Ramiz Delalic (another 'Celo') and Musan Polalovic (Caco) anchored the defence of Sarajevo for the BiH government (before the BiH army got its act together) and were notorious for their brutality and murder - especially Juka who later broke from the BiH and joined the HVO around Mostar.
Eventually, when the BiH got its army together and boosted their own abilities, the gangs became more of a liablity than an asset and clashes took place between the government and their former "heroes".
alija was told by higher then unprofor to nuetralize caco and his gangs, or risk a blind eye towards any actions done by the Serbs and any positive PR for the Serbs. The Blackmail worked.