BARNSTABLE, Mass. — A Cape Cod jury has acquitted a man of all charges in a December 2014 crash that killed an off-duty Westfield firefighter.Paul Dennehy of South Yarmouth was found not guilty Thursday of motor vehicle homicide while operating under the influence of alcohol and other charges in the crash that killed Kevin Regan.Police alleged that Dennehy struck and killed Regan and injured his girlfriend, Lynda Cavanaugh, as they crossed Route 28 after dinner on Dec.