People who ordered it or so called "shadow state" are still free.

Few years ago when they wanted to kill Nino Di Matteo, turncoat said that same people who wanted Falcone and Borsellino dead ordered it, Matteo Messina Denaro said "it had to be done". Explosive were sent from Calabria.

Police managed to find explosives and arrest a few people behind it , but that just shows that same people/ same organizations are still around