'Bonanza' Star Michael Landon's Daughter Says Her Son Was Killed in a Hit-and-Run

It's another tragedy for legendary actor Michael Landon's family. His 24-year-old grandson was struck and killed by a bus in California. The late "Bonanza" actor's daughter, Shawna Landon, is searching for answers over the shocking death of her son, Dylan. She believes it was a hit-and-run. Michael's grandson was born five years after he died. Now, Shawna visits the accident site every week to retrace what she believes were her son's final moments.