Michael DeAngelo admitted to being high on cocaine and fentanyl while going more than 100 mph on the Sunrise Highway last summer.
He was sentenced to seven to 21 years in prison.
He hit a car driven by Marine veteran Patrice Huntley who was celebrating a recent job offer and had taken five members of his family out for ice cream.
As a result of the crash, Huntley, his 10-year-old son Jeremiah Huntley, and his 13-year-old daughter Hannah Huntley were killed.
His 6-year-old step-granddaughter, Chantel Solomon, died six days after the crash due to her injuries.
Prosecutors say his path of destruction started days prior to the crash. Just three days earlier he allegedly fled cops who were called to his home for an overdose.
Family members are expected to deliver victim impact statements at the sentencing hearing.
DeAngelo faces up to 21 years in prison.
RELATED | Mom grieving after kids, husband killed in crash on way to get ice cream in Massapequa
Mom grieving after kids, husband killed on way to get ice cream
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