They also found high-capacity magazines, tear gas, a military-style helmet and 10 silencers.

CNN: Renegade ex-cop Dorner died from single gunshot to head

Outside, the first officer to encounter Holmes -- who was still dressed in body armor, a helmet and a gas mask as he stood near his car -- described him as unnaturally relaxed.

CNN: STORY HIGHLIGHTS

Like the Segway, electric bicycles still leave riders vulnerable to the gas-powered masses of steel and glass that fly by on high-speed roads, and require wearing a helmet--a deal breaker for many style-conscious commuters.

FORBES: Magazine Article

Then he donned a police-style helmet and body armor, tossed a gas canister into the theater crowd and opened fire, prosecutors said.

NPR: Colo. Judge Enters Not Guilty Plea For Holmes