A former Edison officer struck a deal with the prosecutor’s office Monday resolving two arson cases and a host of charges, including multiple counts of attempted murder in the firebombing of his supervisor’s house four years ago. Michael Dotro, 40, of Manalapan, pleaded guilty to attempted murder and second-degree arson in the May 2013 incident where the ex-cop set fire to Mark Anderko’s house while his family slept inside, Middlesex County Prosecutor Andrew Carey said.