The judge said Tuesday David Matusiewicz also will spend four more years on supervised release after finishing his prison time for repeatedly violating his probation on kidnapping and fraud charges.
While on release, Matusiewicz is barred from any contact with his three daughters, whom he took to Central America in 2007 in a bitter custody dispute with his ex-wife.
Matusiewicz was arrested Feb. 11 after his father killed his ex-wife and a friend before a scheduled child support hearing.
Prosecutors said Matusiewicz was prohibited from being around firearms but knew his father always carried a gun.
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