Why was Redfield locked up?

Why was Redfield locked up? In the film, Chris is found trapped in a maximum security cell after his unit’s attempt to control the T-virus in Los Angeles goes haywire; the survivors who find him believe him to be a prisoner.

In the film, Chris is found trapped in a maximum security cell after his unit’s attempt to control the T-virus in Los Angeles goes haywire; the survivors who find him believe him to be a prisoner.