A Derby man was arrested on Thursday after allegedly mentioning the Manchester massacre and saying he understood the shooter’s mindset.

Police investigated at Fusco Corp. in New Haven just after 11 a.m. on Thursday morning after getting a call from a security officer.

The officer at Building 4 of Science Park in New Haven reported having information about an employee, Francis Laskowski, 58, of Derby saying he understood the shooter’s mindset.

The shooter, Omar Thornton killed eight people and injured two before apparently killing himself, police said. He went on a rampage after being fired from Hartford Distributors, a beer distributor and told 911 dispatchers that HDI was a racist organization and he took things into his own hands. The company said that Thorton was treated fairly.

Police investigated, interviewed witnesses and arrested Laskowski. He was charged with threatening and breach of peace, police said. Police found no weapons at the scene.

