The good thing is it wasn't your sisters bff Sunster but still a tragedy for the victim. I can't imagine what it would be like to be kidnapped and experiencing whatever happens after.
The person who was murdered is actually not related to the OP's sister, thankfully. The two just happen to share the same name, general physical description and location. Still no less horrible, of course.
Ugh, rip to that poor girl. I hope the piece of shit that murdered her is never released from prison, throw him into a dark hole in the ground to rot until he dies.