Four people were killed and a fifth was injured in a mass shooting at a Midtown Manhattan office building on Monday. The injured victim was an employee at the NFL, according to NFL Commissioner Roger Goodell. Here's what we know about the four people killed:

The executive was shot and killed in the lobby of the ritzy Park Avenue office tower when gunman Shane Tamura opened fire.

Friends, family and co-workers filled Manhattan’s Central Synagogue on E. 55th St., Thursday where they traded stories about how LePatner mixed her professional drive with a personal touch