California parole agent Joshua Lemont Byrd’s suspected killer was charged with murder on Monday. Bryan Keith Hall is accused of shooting Agent Byrd Thursday afternoon inside a California Department of Corrections and Rehabilitation office,

The man accused of killing a state parole officer inside an East Oakland office building last week has an extensive criminal history dating back nearly 30 years, according to court documents filed Monday by the Alameda County District Attorney’s Office.

Newly obtained court documents show that the man who allegedly shot and killed Oakland parole agent Joshua Lemont Byrd has an extensive criminal history stretching back nearly 30 years.