Parkland school shooter Nikolas Cruz went into shock after cops arrested him

Nikolas Cruz started hyperventilating and vomited “clear fluid” as a witness prepared to identify him as the Parkland school shooter, according to the officer who arrested him about an hour after the grisly massacre.

Cruz, who is now facing charges of premeditated and attempted murder, slipped away from the hectic scene at Marjory Stoneman Douglas High School, where 17 people were killed on February 14.

When Coconut Creek police officer Michael Leonard confronted the 19-year-old less about an hour later, Cruz appeared to go into shock, according to the police report obtained by the Miami Herald.

Cruz opened fire at the Florida high school at 2:21 p.m. before he ran out of the building, blending in with other students fleeing the scene, according to Broward County Sheriff Scott Israel.

The suspect headed to a nearby Walmart and McDonald’s before Leonard found him walking in Coral Springs at around 3:36 p.m., according to the newly released report.

"Given the magnitude of this crime and not knowing if the subject was still armed, I began to give the subject loud verbal commands," Leonard wrote.

Cruz followed the officer’s orders to lie face down and appeared calm while Leonard called for backup.

When the second officer turned up, the cops handcuffed the teen while they waited for a witness to arrive at the scene.

At one point, Cruz said he had trouble hearing — a possible symptom from torrent of gunshots he unleashed, according to the report.

When he appeared antsy, Leonard calmed him down by saying “he was going to be fine."

But when a Stoneman Douglas employee turned up to confirm he saw Cruz entering the school that day, Cruz began hyperventilating, the report stated.

The officers called paramedics, and Cruz was taken to a hospital before he was sent to jail.