A witness who escaped a California bank before a hostage situation described the suspect displaying a trigger connected to wires and a vest while ordering people to the floor.
The roughly 15-hour standoff ended when the FBI killed the suspect as concerns grew over his erratic behavior and a diabetic hostage's condition.
Authorities found multiple improvised explosive devices at the scene and were conducting further tests on them.
AI-generated summary was reviewed by a CNN editor.
Freddy Arredondo was in line at Chase Bank in Bakersfield, California, Tuesday afternoon chatting with a greeter when a man came up to him.
