Police in Hoboken, N.J., said the 21-year-old Simmons was struck by a black SUV around 3:30 a.m. ET. His mother, Monique Steele, told CBS New York the vehicle that hit her son was going at least 70 miles per hour.

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“To be speeding enough to kill my child is beyond me,” Steele told CBS2.

A day after seeing his cousin get drafted by the Sixers, Zachary Simmons had attended a friend’s birthday party on Friday. 

Ben Simmons sent a series of tweets Saturday night memorializing his cousin.