Maniac randomly stabs teen near NYC City Hall before flashing eerie smile as victim left in terror

A smirking maniac randomly stabbed a college student in the neck Wednesday morning, leaving the stunned teen “bleeding out” near City Hall in Manhattan.

Alan Ryvkin, 19, survived the savage assault, telling The Post that the attack unfolded while he went to court to deal with an unregistered vehicle ticket.

Ryvkin said as he spoke with a woman outside the city’s municipal building at 1 Centre St. at about 11:30 a.m. a stranger quietly walked behind him and knifed him.

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“When he walked away, the dude looked at me and smiled with the knife in his hand,” Ryvkin, a Brooklyn College student, said.

“I didn’t know who it is. I don’t know what it is. I got stabbed and I sit on the ground and start bleeding out.”

Blood still stained the bricks in a courtyard between 1 Police Plaza and the Thurgood Marshall US Courthouse an hour after the terrifying attack.

The blade-wielding perp, who wore a dark leather jacket and brown hat, ran off down Reade Street and remained on the loose early Wednesday afternoon, police and sources said.

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Sam Townsell, 24, a bartender at the outdoor Jury Duty bar, watched as a bloodied, apparently shell-shocked Ryvkin was loaded into an ambulance.

She realized she had seen him earlier sipping coffee – unaware that violence was about to descend on the seemingly safe area around the heart of city government.

“It’s scary – there’s a police department right there,” Townsell said, referring to NYPD headquarters.

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“You wouldn’t think acts of violence like this would happen in an area like this, where there are cops everywhere. There’s not anywhere around here that you wouldn’t see a cop, so it’s kinda scary.”

Medics rushed Ryvkin to Bellevue Hospital, where doctors treated him for a stab wound between his lower neck and upper back.

A bandaged Ryvkin disputed his vehicle was unregistered – which was the reason that brought him to court and, ultimately, cross paths with a violent lunatic.

“It’s horrible,” said the lifelong New Yorker.

“It feels like New York is not the place to be. It’s very unsafe.”

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