William Patrick Walsh, 24, pleaded guilty to second-degree murder in the death of Elaine Walsh, 55, who was killed by multiple blows from a camping hatchet on April 21, 2012, in their home in the 5400 block of Gwynne.
Following a sentencing hearing, Criminal Court Judge Lee Coffee gave Walsh 20 years in prison with no parole.
Walsh had been treated for mental health issues, but doctors had found him competent to stand trial and capable of assisting his attorneys in his defense.
His father, John Kevin Walsh, told police that he and his wife talked to their son around 1 a.m. about the noise he was making.
He said that soon after 5:30 a.m. his son came into the bedroom and said he had killed someone.
John Kevin Walsh then found his wife dead on a living room sofa.
Elaine Walsh was business manager at the University of Memphis University College.
Prior to that she worked on the assignments desk at WMC-TV Channel 5.
Prosecutors handing the case include administrative assistant Thomas Henderson and assistant district attorney Ann Schiller.