Billie Hollenbeck is accused of trying to set a bag of what initially appeared to be fertilizer on fire on July 28.
The bus driver told police he thought Hollenbeck was holding a bag of fertilizer. It turns out the bag was full of seeds.
RTD says the driver immediately kicked Hollenbeck off the bus and called 911.
Police didn't catch Hollenbeck until several days later when he was arrested on unrelated charges.