Angela Lin, a 29-year-old Google engineer, was killed by a falling tree branch while hiking the popular Tuolumne Grove trail at Yosemite National Park.

The trails of Tuolumne Grove, a popular site in Yosemite National Park, wind through forests of pine and giant sequoias, the largest trees on earth. On July 19, after hiking about a mile into the grove, Angela Lin, 29, and her friends heard a snapping sound above them.

The fatal incident occurred while Angela Lin was admiring large sequoias along a trail in the park with her boyfriend and two friends.