Complex sentence: The next day, Stan returned with Hooker as her boyfriend, and her family--explained by Stan at her trial as being due to her happiness at visiting them--took a photograph of the pair happily smiling together.
Split into simpler sentences: The next day, Stan returned with Hooker as her boyfriend. Her family--explained by Stan at trial as being due to her happiness at visiting them--took a photograph of the pair happily smiling together.