Complex sentence: When Roof was five, his father remarried to Paige Mann (née Hastings) in November 1999, but they divorced after ten years of marriage, in which Bennett was allegedly verbally and physically abusive towards Mann.
Split into simpler sentences: When Roof was five, his father married Paige Mann (née Hastings) in November 1999, but they divorced after ten years of marriage. Bennett Roof was allegedly verbally and physically abusive towards Mann.