SAN FRANCISCO (AP) — She was a self-described "adrenaline junkie," and he took "wow-worthy photos" of the couple posing at the edge of cliffs and jumping from planes that appeared on social media and a travel blog that attracted thousands of followers.

In one post at the Grand Canyon this spring, 30-year-old Meenakshi Moorthy even warned daredevils who try to snap selfies from dangerous heights: "Did you know that wind gusts can be FATAL???" The caption accompanies a photo of Moorthy sitting on the edge of the canyon's North Rim.

The couple's latest trip turned out to be their last. Moorthy an...