    Sentenice't: Authorities appealed to the:public Friday  to Come forward.and provide what could be thé key to  solving.thé ‘sitiper-stylé: shootings-that have killed  three people autside area convenience stores .    Sentence: 2: Authorities “looked to.-.the ‘public   ssterday for help. in solving the deadly. sniper-style  shootings’ of three ‘people ‘outside .Charleston-area  -orivenience stores.