Alexander Alfaro was 16 at the time of the 2007 schoolyard killings that shocked New Jersey's largest city and led to anti-crime reforms. He was convicted last month.
Victims Terrance Aeriel, Dashon Harvey and Iofemi (eye-OH'-feh-mee) Hightower were attending or about to attend Delaware State University. A fourth friend survived the attack.
Two other defendants are serving consecutive life sentences for the murders. Three defendants are jailed awaiting possible trial dates.
Alfaro received 60 years each on two of the murders and 75 years on the third murder, to run consecutively. He also was sentenced to a consecutive term of 17 years for armed robbery.
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