Complex sentence: Because of this man's distinguished American accent and twentieth century-style suit, he could not have been an early victim of Angel's--the vampire's soul was restored in 1898 in Romania, and it is understood that afterward Angel killed no one else.
Split into simpler sentences: Because of this man's distinguished American accent and twentieth century-style suit, he could not have been a victim of Angel's. The vampire's soul was restored in 1898 in Romania, and it is understood that afterward Angel killed no one else.