It was the day of Halloween in 1969, in the town of Oscada, Michigan (USA), when two teenaged girls were last seen alive. Patricia Spencer and Pamela Hobley both left their high school early after a bomb threat spooked the students and teachers at the school that day. Family members and Police believe both girls were murdered. No suspects have been named and a former boyfriend of one of the girls is alleged to have disappeared himself a year or so after the two went missing. It is not know if that is related to the case.
For more information: https://discover.hubpages.com/politics/patricia-spencer-and-pamela-hobley-teenagers-vanish-on-halloween
Savagewatch - Unsolved Crime 