Mystery at Malibu Creek State Park: Who killed father at campground?

From left, Dominic Solge, Lawren Durham, David Capone, Tim Watson, and Andrew Lindley walk together, during a visit to Malibu Creek State Park in Calabasas.

Abigail Xom, foreground, and her husband, Rafael Gomez, return from a hike at Malibu Creek State Park in Calabasas.

A road leading to the camping area at Malibu Creek State Park in Calabasas is closed following a fatal shooting.

Daniel Garcia and Kimi Markley return from a hike in Malibu Creek State Park in Calabasas.

Malibu Creek State Park is closed during the investigation into a fatal shooting.