Man accused of stabbing deputy in Palm Desert pleads not guilty Man accused of stabbing deputy in Palm Desert pleads not guilty A La Quinta man accused of stabbing a Riverside County sheriff's deputy in the leg during a scuffle in Palm Desert pleaded not guilty today to two counts of attempted murder on a peace officer and other felony charges. Christian Matthew Choi, 50, was arrested March 30 in the area of El Paseo and Lupine Lane following the alleged altercation that left the deputy with a non-life-threatening stab wound. Christian Matthew Choi Along with attempted murder on a peace officer, Choi faces charges of robbery, resisting an executive officer and assault with a deadly weapon, along with several weapon and great bodily injury sentence-enhancing allegations.