By KEN RITTER and SANDRA CHEREBLAS VEGAS — The wife of a Nevada Assembly member accused of threatening another state legislator reportedly told police she was worried about her husband’s mental stability, according to reports released Tuesday.Assemblyman Steven Brooks, D-North Las Vegas, was arrested Saturday night in his hometown on a felony charge of intimidating a public officer by threat of physical violence.The Las Vegas Sun, citing a law enforcement report, said Brooks’ family members told police that Brooks said he was “willing to have a shootout” and was “not afraid to die.”North Las Vegas police Sgt. Tim Bedwell wouldn’t …