Kimberly Mangrum Case: Murder, Cover-Up, and Appeals

Kimberly Mangrum is a Tennessee woman convicted in 2004 of orchestrating the murder of her husband’s ex-wife, Lee Ann Smith Mangrum, in Dickson County in 2002. A jury found her guilty of first-degree felony murder, especially aggravated kidnapping, and aggravated burglary. She is serving a life sentence at the Tennessee Prison for Women in Nashville and will not be eligible for parole until 2058.¹

What set the case apart, and what drew national attention to it years later, was that Mangrum forced her two young stepchildren to help kill their own mother.

The Custody Battle Behind the Killing

Lee Ann Smith Mangrum was a 34-year-old teacher’s aide. She and Terry Mangrum Sr. had divorced, and after Terry Sr. married Kimberly, the state granted the new couple full custody of the two children the former spouses shared: Terry Jr. and Alyshia.¹

Trial testimony described a household soaked in hostility toward Lee Ann. Kimberly threatened repeatedly to kill her, disparaged her in front of the children, and forced them to phone their biological mother and tell her they wished she were dead. The abuse extended to the children themselves. Witnesses described Kimberly burning them with cigarettes and slicing Terry Jr.’s throat with a wire hanger.¹

The Night of September 7, 2002

Kimberly put both children in her car and went looking for Lee Ann. After finding her, she smashed the window of Lee Ann’s Jeep with a baseball bat and pulled her from the vehicle. She beat her with the bat, inflicting severe blunt force trauma to the head and heavy bruising across the torso and buttocks.²

She then forced 15-year-old Terry Jr. to strike his mother with a piece of wood. The group moved Lee Ann to the edge of Turnbull Creek. Kimberly pushed pills into her mouth, rolled her into the water, and directed Terry Jr. to hold her under until she was dead. Eleven-year-old Alyshia was present throughout.²¹

Afterward, Kimberly forced the children to break into Lee Ann’s trailer, ransack it, and take valuables to stage the scene as a burglary gone wrong. She also had them clean the car and the bat.²

How the Cover Story Fell Apart

Lee Ann’s body was found floating in Turnbull Creek the next morning, September 8, 2002, with her Jeep submerged nearby. The autopsy identified drowning as the cause of death, with blunt force injuries consistent with a bat attack.³

When investigators interviewed the Mangrums on September 9, all four told the same story: Lee Ann had come to the family’s home the night before with a mysterious man who had “salt and pepper” hair. The case went cold for more than a year while investigators worked through the family’s conflicting and false accounts.¹

Forensic evidence broke the case open in late 2003 and early 2004. Blood on a window at Lee Ann’s trailer matched Terry Jr.’s DNA, and his fingerprints appeared on the broken glass. A palm print on the glass belonged to Alyshia. In February 2004, testing tied Kimberly’s DNA to a cigarette butt recovered from Lee Ann’s yard.²

Confronted with the physical evidence, Alyshia abandoned the family’s story. Terry Jr. produced a handwritten note dated February 4, 2004 claiming sole responsibility for the killing, but he later testified that Kimberly had threatened to kill him if he did not write it. Alyshia received immunity and became the prosecution’s key witness, providing an eyewitness account of the entire attack.²³

Convictions and Sentence

A Dickson County jury convicted Kimberly on four counts: aggravated burglary (a lesser-included offense of especially aggravated burglary), especially aggravated kidnapping, attempted first-degree premeditated murder, and first-degree felony murder. The court merged the two murder-related convictions and imposed concurrent sentences of life for felony murder, 25 years for the kidnapping, and 6 years for the burglary.²

What Happened to Terry Sr. and Terry Jr.

Terry Mangrum Jr. was charged as an adult despite being 15 at the time of the killing. He pleaded guilty to second-degree murder and testified against Kimberly at trial.¹

Terry Mangrum Sr. was charged with accessory after the fact and pleaded guilty. Testimony established that he disposed of the baseball bat by throwing it into a creek near the family’s home roughly a month after the murder.¹

The Appeals

Kimberly challenged her convictions on two main grounds: insufficient evidence and prosecutorial abuse of the grand jury process. She argued that the district attorney had used a grand jury subpoena to compel Alyshia’s testimony as pretrial discovery after Kimberly was already indicted, rather than to investigate new crimes.

The Tennessee Court of Criminal Appeals rejected both arguments and affirmed her convictions on November 9, 2011.⁴³²

Where the Case Stands Today

Kimberly Mangrum remains at the Tennessee Prison for Women in Nashville, with parole eligibility set for 2058. An online petition asserting her innocence has drawn a small number of signatures. It claims no DNA evidence placed her at the scene and that Terry Jr. acted alone. Both claims contradict the trial record, which included DNA evidence linking Kimberly to the victim’s property and eyewitness testimony from two of her stepchildren describing her as the instigator and primary attacker.²¹

The case was later featured in a 2020 episode of the Investigation Discovery series Southern Gothic.¹

1
The Tennessean. Lee Ann Mangrum Murder Investigation Discovery
2
FindLaw. State v. Mangrum
3
Tennessee Courts. Supreme Court Affirms Convictions Upon Finding No Prosecutorial Misconduct
4
Tennessee Courts. State of Tennessee v. Kimberly Mangrum – Court of Criminal Appeals