The FBI says an elderly-looking bank robber dubbed the "Geezer Bandit" may not be as old as he appears.
FBI spokeswoman Laura Eimiller says the robber believed to be responsible for 16 holdups in California may be wearing an elaborate costume. Witnesses have repeatedly told investigators that the robber appears to be wearing a mask and gloves.
Investigators also point to a surveillance video of a robbery earlier this month at a Bank of America in San Luis Obispo, where a security dye-pack exploded as the robber was making his getaway.
Eimiller says the speed with which the so-called "Geezer" was able to run away does not match his appearance of 60 to 70 years old.
Authorities are offering a $20,000 reward for information leading to an arrest.