Early on Christmas morning, at about 3:30, a Brooklyn park man hit a Baltimore teenager who stepped into the roadway where the man was driving his Chevrolet Colorado pickup truck. He called 911, and Anne Arundel County Police say that 25-year-old Ezer Yanez tried to help 18-year-old Carlos Enrique Ho-Macz, by rendering first aid.  But, police say Ho-Macz was pronounced dead at the scene. An autopsy will determine what exactly killed the teen.  Yesterday the FBI assisted in identifying the dead teen. The driver was not hurt.