High school shooter 'wore a gas mask,' used hand grenades and intentionally set off fire alarm: Florida senator
Florida Senator Bill Nelson on MSNBC

The senior US senator for the state of Florida revealed new details about Nicolas Cruz, the suspected gunman in the Marjory Stoneman Douglas High School mass shooting.

MSNBC anchor Chris Matthews asked Sen. Bill Nelson (D-FL) about the politics, but the former astronaut quickly detoured to offer more details.

"What is your reaction to the use of guns by this shooter? All these people dead. He had an AR-15, he had multiple magazines, what do you make of that situation?" Matthews asked.

"I want to answer that specifically, but let me give you some new information," Sen. Nelson replied.

"He wore a gas mask and smoke grenades, he set off the fire alarm so the kids would come out into the hallways and thus, he had the opportunity with a crowded hallway to start picking off people," Sen. Nelson reported.

"So your question is the politics, it won't stop until the American people say enough is enough and when is that going to occur?" Sen. Nelson asked rhetorically.