per Hubbs...
According to the incident report, the "gun" appears to have been a CO2 powered pellet gun.
Also it appears that Edwards and Richardson were the two who approached the victims car in black hoods and demanded with the pellet gun that they give them all the have got.
All three are charged with attempted armed robbery. The driver of the car they were in, a female was charged with attempted armed robery, simple possession of Schedule VI and possession of drug paraphenalia. She had a marijuana grinder in the car and a small bag of what appeared to be marijuana in her pocket.