SPRING VALLEY (VINnews) — The Monsey community was shaken on Tuesday after the news broke that a fatal stabbing had occurred inside the Finkelstein Library in Spring Valley.

As much as such a heinous crime can never ever be justified, the shock and outrage surrounding the incident was escalated dramatically by the revelation of the suspect’s motive.

Spring Valley Police Chief Paul Modica revealed on Wednesday that the seemingly random stabbing attack, started with a small interaction.

According to Modica, Finkelstein Library security guard Sandra Wilson was at the computer terminals on the third floor of the library, when she approached Blanchard Glaudin and asked him to turn down the music on his phone.

In response, Glaudin simply stabbed her.

Glaudin was charged with second-degree murder and is currently being held in the Rockland County jail.

Wilson was pronounced dead Tuesday at Good Samaritan Hospital in Suffern, after being stabbed several times with a kitchen knife.

After the stabbing, Glaudin was held down by heroic visitors of the library until the police arrived.