SAN MARCOS — A man who was gravely injured over the weekend while allegedly attempting to commandeer a moving tree-trimming truck near Palomar College has died, authorities said Tuesday.
Mark Douglas Heninger, 56, was pronounced dead Monday at a hospital, according to the San Diego County Sheriff’s Office.
Deputies responding to a reported traffic collision Saturday found Heninger lying in the roadway in the 200 block of South Pacific Street with extensive head injuries. He was transported to a hospital in serious condition…