▁had ▁killed ▁Pet ros ino . ▁According ▁to ▁writer ▁Arr igo ▁Pet acco ▁in ▁his ▁ 1 9 7 2 ▁book ▁on ▁Joe ▁Pet ros ino , ▁Cas cio ▁Fer ro ▁said : ▁" In ▁my ▁whole ▁life ▁I ▁have ▁killed ▁only ▁one ▁person , ▁and ▁I ▁did ▁that ▁dis inter ested ly ▁… ▁Pet ros ino ▁was ▁a ▁brave ▁advers ary , ▁and ▁des erved ▁better ▁than ▁a ▁shame ful ▁death ▁at ▁the ▁hands ▁of ▁some ▁h ired ▁cut - th ro at ." ▁ ▁A ▁report ▁by ▁Bald ass are ▁Ce ola , ▁the ▁police ▁commission er ▁of ▁Pal ermo , ▁concluded ▁that ▁the ▁crime ▁had ▁probably ▁been ▁carried ▁out ▁by ▁M af ios i ▁Carlo ▁Cost ant ino ▁and ▁Anton ino ▁Pass an anti ▁under ▁Cas cio ▁Fer ro ' s ▁direction . ▁Ev idence ▁was ▁thin , ▁however , ▁and ▁the ▁case ▁was ▁effectively ▁closed ▁when ▁in ▁July ▁ 1 9 1 1 ▁the ▁Pal ermo ▁Court ▁of ▁App e als ▁dis charg ed ▁Cas cio ▁Fer ro , ▁as ▁well ▁as ▁Cost ant ino ▁and ▁Pass an anti , ▁due ▁to ▁ins u fficient ▁evidence ▁to ▁send ▁them ▁to ▁trial . ▁Pet ros ino ' s ▁murder ▁was ▁never ▁solved . ▁Nevertheless , ▁Cost ant ino ▁and ▁Pass an anti ▁were ▁identified ▁as ▁the ▁most ▁likely ▁assass ins . ▁Cost ant ino ▁died ▁in ▁the ▁late ▁ 1 9 3 0 s ▁and ▁Pass an anti , ▁in ▁March ▁ 1 9 6 9 . ▁▁ ▁In ▁