Las Vegas mom was driving 121 mph in crash that killed baby: cops

A Las Vegas mom was driving at a high rate of speed when she crashed — fatally ejecting her 1-year-old son, authorities said.

Lauren Prescia, 24, was going 121 mph when she hit another car making a right turn Sunday onto North Rampart boulevard, news station KVVU reported.

The impact caused her own car to veer off the road and strike a marquee sign, severing the car’s right half, police said.

Witnesses called 911 and said a baby was thrown from the car and showed no signs of life, KVVU reported.

The baby, Royce Jones, who had been in a carseat, suffered severe trauma to his head and was later pronounced dead, the outlet reported.

The boy’s father, Cameron Jones, said he had been driving behind Prescia and witnessed the horrific accident. “I seen him in his car seat, I got him out, I thought he was okay until I felt his head and then I knew,” said Jones, who was on the phone with Prescia as she sped up and asked her to slow down, news station KTNV reported.

Police said Prescia, who experienced minor injuries, had bloodshot eyes and reeked of alcohol.

The other driver, a 36-year-old woman, also was left with minor injuries, police said.

Prescia now faces multiple charges including DUI resulting in death reckless driving and abuse, as well as neglect or endangerment of a child, the outlet reported.