Complex sentence: Meanwhile, none of their coworkers in NY know their whereabouts and the killer has planted a bug at Meryl's office, and in her assistant's purse, hoping to gain information, which is eventually successful.
Split into simpler sentences: Meanwhile, none of their coworkers in NY know their whereabouts. The killer has planted bug at Meryl's old office and in her assistant's purse, hoping to gain information, which is eventually successful.