A New York City police officer who was among the four people shot and killed by a gunman during a rampage at a Manhattan office tower will be laid to rest Thursday. Officer Didarul Islam, 36, was fatally shot Monday in a midtown building housing the National Football League’s headquarters.

Four people were killed and a fifth was injured in a mass shooting at a Midtown Manhattan office building on Monday.

As more information comes out about the man who shot and killed four people inside a midtown Manhattan office building before turning the gun on himself, there is a question of whether he should have been allowed to keep his concealed carry permit.