Man accused of making social media threats facing new charge

John Coulouris, 18, of Hackensack, was re-arrested on Friday night

LIVINGSTON -- An 18-year-old Hackensack man who was accused of making threats on social media earlier this month is facing a new charge for allegedly threatening a Livingston resident, authorities said.

John Coulouris, 18, of Hackensack Essex County Prosecutor's Office 

John Coulouris was re-arrested at his home on Friday night after detectives with the Essex County Prosecutor's Office developed information about a new threat posted on social media, Chief Assistant Prosecutor Thomas S. Fennelly said in a news release.

Coulouris was arrested on Tuesday for posting messages on various social media sites "threatening violence in Livingston" including a message that a person would "shoot up" Livingston High School, officials previously said.

He was charged on Tuesday with endangering the welfare of a child by distributing child pornography, terroristic threats, invasion of privacy and two counts of cyber harassment.

Coulouris was released on $175,000 bail on Wednesday, but, after his arrest on Friday night, he was again remanded to Essex County Correctional Facility on $100,000 bail with no 10-percent option.

Livingston police learned of threats based on reports from concerned citizens, and later said the threats were not believed to be credible. 

"Please know these actions were not made by a current LHS student," Superintendent Christina Steffner and Livingston High School Principal Mark Stern said in a previous joint statement on Sept. 19. "Police have called the threats not credible."

Still, the threats continued on social media, prompting the district to cancel its planned back-to-school night and to have a delayed opening. 

Authorities haven't yet said what led to the child pornography and invasion of privacy charges against Coulouris.

Anyone with more information on these incidents can contact the prosecutor's office tips line at 1-877-TIPS-4EC or 1-877-847-7432.

Justin Zaremba may be reached at jzaremba@njadvancemedia.com. Follow him on Twitter @JustinZarembaNJ. Find NJ.com on Facebook.