(CNN) -- A skydiving instructor last seen a week ago in eastern Utah left behind cash, a passport and his driver's license, said an acquaintance who is helping in the search.
David Brown, 37, disappeared June 29 in the vicinity of Skydive Moab, said owner Clint MacBeth. MacBeth found Brown's personal items, including an unspent paycheck.
Brown's family in Halifax, Nova Scotia, filed a missing persons report Saturday with the Moab Police Department and is seeking the public's health.
According to MacBeth, Brown recently went through a divorce and friends initially assumed he has gone to Las Vegas to visit his girlfriend. But they later realized he wore only shorts, a T-shirt and sneakers, making him unequipped to deal with 100-degree-plus temperatures, MacBeth said.
Brown is described as 6 feet tall and 180 pounds, with green eyes and dark brown hair. He has four tattoos: a black bat on his left shoulder, a hummingbird, an alien head and a moustache on his back.
"Dave is a popular member of the skydiving community and well-loved by all who know him," according to family and friends. "Those closest to Dave around the time he was last seen are confused as to why such a talented, well-liked extreme athlete would be missing."
Moab is known for its red-rock landscapes and proximity to Arches National Park and Canyonlands National Park.
CNN's Alan Duke contributed to this report.