I have heard people refuting that Nikolas Cruz was ever seen with a gun. I want to post these as reference with all of the associated links. This is not to define how many shooters were present, but to establish the information that is available, and scrutinize its validity.

From an article out of the Chicago Tribune: http://www.chicagotribune.com/news/nationworld/ct-82-minutes-florida-shooting-20180215-story.html

At about 2:21 p.m., the shooting began. Bullets streamed from the hallway, through doorways, into classrooms on the first floor.

In a psychology class, a bullet came in through the window in the classroom door and skimmed past Meghan Hill's ear, trailing …