(New Castle, IN)--The trial of a Hagerstown man who was allegedly driving under the influence of marijuana and caused a crash that killed his own two-year-old son has been pushed back.  26-year-old Christopher Clark is now set for trial in June in Henry County.  Carson Clark of New Castle died in the crash.  His six-year-old sister, Makenzie, suffered a broken leg.  Christopher Clark faces charges that include reckless homicide.