Man charged with mutilating body in connection with missing 29-year-old Livingston County woman Kayla Pierce was reported missing by her mother in November Tags: DETROIT – Dowan Knighton, 47, is in jail in connection with the recently discovered remains of 29-year-old Kayla Pierce of Livingston County. Wayne County Prosecutor Kym Worthy charged Knighton with mutilation of a dead body, concealing the death of an individual and tampering with evidence. All of this started with a call to police. Detroit police said Pierce’s mother reported her missing on Nov. 24, 2020. A few months later, Local 4 cameras were on the scene Thursday as officers with the Detroit police, Michigan State Police and the Livingston County Sheriff’s Department found her remains in Detroit on Feb. 11 at about 8 p.m.