The Longueuil police have not yet solve the mystery of the double murder of Mario Corbeil(15) and Diane Dery (13) The two young people who were were shot and left in a field in Longueuil,Quebec May 2oth 1974. Diane was placed half naked on top of Mario..We know, however, that the girl was not sexually molested, but Mario was beaten.
This case is still a cold case.