Simplify the following text for a Grade 15 native English-speaking person.
Original: FrancetiÄ participated personally in arresting and interrogations of prominent Serbian and Jewish leaders ( MiÅ kina , Albahari ) and ordered the murders of some of them .
Simplified: FrancetiÄ personally arrested and interrogated prominent Serbian and Jewish leaders ( MiÅ kina , Albahari ) and ordered the murders of some of them .