A man arrested in October after a high-speed chase through Grass Valley that began after he was mistakenly identified as one of the FBI’s 10-most wanted is now in federal custody on charges of being a felon in possession of a firearm, possession of methamphetamine with intent to distribute, and possession of a firearm during a crime of violence or drug trafficking. Although Christopher Lee Lang was not, in fact, Glen Stewart Godwin — a convicted murderer who had escaped from Folsom Prison 25 years earlier — he was on the lam from a Nevada prison. The strange saga began …