Johnny Borizov was convicted of hiring his friend, 25-year-old Jacob Nodarse, to kill the family of his ex-girlfriend.
Nodarse was convicted of fatally shooting Jeffrey and Lori Kramer and their son, Michael, in March 2010.
Daughter Angela Kramer escaped the home.
Borizov has a son with Angela Kramer and was in a bitter custody battle.
Nodarse will be sentenced in August.