California state prison inmate and four-time convicted murderer has been formally charged with the strangulation murder of his wife during a conjugal visit, the Amador County District Attorney's Office told KCRA 3 on Friday. David Brinson, 54, is serving four consecutive life sentences without the possibility of parole for four counts of murder with enhancements for the use of a firearm, according to the California Department of Corrections and Rehabilitation. He has been in CDCR custody since February 1994, after his 1993 conviction of four murders in Los Angeles County.