The gruesome murder of 10 year old Holly Jones, from Toronto, has shaken the residents of Canada's largest metropolis, long touted as being among the safest big cities in North America.  On May 12, the Toronto girl headed home from a friend's house just six blocks from her own home and went missing.  Parts of her body were found the next day in two black bags in Lake Ontario, one reportedly underwater, weighted down by a dumbbell.  As of yesterday, Holly's killer is still at large.  Police have yet to release details of the crime, although it is widely assumed in Jones' community that a sexual assault was involved.  Law enforcement officers have called on Jones' neighbors to volunteer DNA samples.  Some Toronto residents have launched a petition drive for stiffer penalties for sex crimes, and the murder has reportedly renewed debate about the death penalty, which Canada abolished in 1976.