rome/palermo death sicilian mafia boss salvatore toto riina friday mark end cosa nostra crime group unlikely allow one man power ever top magistrate former mobster say 87-year-old riina die hospital parma northern italian city serve 26 life sentence murder commit 1969 1992. end riina end cosa nostra chief magistrate sicily capital palermo francesco lo voi tell reuters remain understand whether men cosa nostra seek direct successor new organizational structure lo voi say gaspare mutolo admit strangle 20 people agree mutolo 77 turn state witness early 1990s age 51 become key witness dozens mafia case share jail cell riina 1960s become trust bodyguard driver afterward mutolo still wear balaclava hide identity cameras felt pity hear former friend cell mate die say friend help even save life saw little bite father figure mutolo tell foreign reporters rome riina death change little sicily say palermo still mafia back-room deal several recent case show mob still extort business owners island still seek win lucrative public contract back-room deal corrupt politicians bureaucrats imagine politics without mafia mutolo say future cosa nostra without riina whose brutality undermine trustworthiness organization drive mafiosi like mutolo hand state uncertain calabrian mob know ndrangheta turncoats take drug rout dominate cosa nostra calabrians major importers cocaine south america europe north america even politicians wary deal sicilian mob mutolo say cosa nostra 1980s mainly turncoats mutolo say calabresi take trust cosa nostra always military-like structure riina single boss boss power divvied territory local boss meet together so-called commission discuss strategy settle dispute riina make dictator cosa nostra give cosa nostra see charismatic leader necessity future lo voi say return decentralization operations decision make riina take boss dead mafia live magistrate mobster say