A backpack belonging to the missing son of boxing promoter Bob Arum was found on a mountain near Seattle this week. Search and rescue crews reportedly discovered 49-year-old John Arum’s backpack Wednesday night near the 8,500-foot summit of Storm King Mountain. John Arum was reported missing last Monday while climbing or hiking in the North Cascades National Park. He is an attorney in Seattle and reportedly an experienced mountain climber. About 50 staffers from the King County Sheriff’s Department, National Park Service, and other agencies continue to search for the younger Arum, who was climbing alone. Bob Arum and his wife Lovee are reported to be in Seattle and closely monitoring the search effort. During his career, the legendary boxing promoter has been behind some of the biggest names in the sport, promoting fights involving Sugar Ray Leonard, Evander Holyfield, Oscar De La Hoya, and most recently Manny Pacquiao.