Threats to Rockland County school lead to arrest for lethal arsenal

CLARKSTOWN - A man with a lethal arsenal who made phone threats to a local school has been arrested.

Police announced Sunday that Robert Csak, 32, of Lindenhurst, was arrested on weapons charges after he left six threatening messages on the Summit School's voicemail.

According to Clarkstown Police, an employee at the school at 339 N. Broadway in Upper Nyack called Saturday to report the messages from Csak, a former student at the high school for students with emotional and behavioral special needs.

Staff and police identified Csak, who attended the school in 2002, by using caller identification and school records.

Clarkstown police then called the Suffolk County Police Department with the information and requested that Suffolk police perform a welfare check on the suspect.

After entering Csak's apartment, Suffolk police found 19 firearms, a silencer, more than 200 high-capacity magazines, a Tommy gun, night vision goggles, bulletproof vests, gas masks, knives, asps and a bump stock like the one used to create an automatic weapon out of a semi-automatic weapon at a mass shooting in Las Vegas.

Csak wasn't home at the time police visited him. A landlord let police into the home.

Police later found Csak in his vehicle around 9 p.m. Saturday night. He was charged with nine weapons-possession-related counts and is scheduled to be arraigned Monday at the First District Court in Central Islip.

Clarkstown Police Chief Raymond McCullagh said in a statement that Csak's threats could have been a "potentially lethal incident."

"This is another example of schools identifying a potential problem and law enforcement agencies leaving no stone unturned to ensure that the safety of students and staff is paramount," McCullagh said.

Twitter: @ErnieJourno