The 17-year-old boy who allegedly mowed down two New Jersey teen girls and was stalking one of them spent months planning his attack , the girls’ families said late Wednesday.

Police had initially deemed the crash to be a hit-and-run accident when two 17-year-old girls were fatally struck by an SUV while riding e-bikes on Monday.

“It is now vital that the truth be shared: This was not an e-bike accident, and it was not a hit-and-run,” the families of Maria Niotis and Isabella Salas said in a joint statement shared with WNYW. “This was murder in the first degree .”

The families said they plan to deliver a statement to the public in Union at 7:45 p.m. Thursday.

“A coward of a man, who had been plotting this attack against Maria for months, carried out this horrific act, taking

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