Joe Carroll , recent months , arrested for allegedly setting more than 20 fires Friday night . Tracey recently became a paid firefighter with the department , according to Carroll . String of arsons investigated in Pennsylvania ; Tracey not linked to others . Tracey recently became a paid firefighter with Coatesville .
Joe Carroll , recent months , arrested for allegedly setting more than 20 fires Friday night . String of arsons investigated in Pennsylvania ; Tracey not linked to others . Tracey recently became a paid firefighter with Coatesville .