In a case that stunned the Norfolk community, a judge has found 36-year-old David Martel MacRonald not guilty by reason of insanity for the 2023 killing of his grandmother, 84-year-old Liu-Chih Howell. The decision came Monday after evaluations by two independent mental-health experts concluded MacRonald was legally insane at the time of the crime.
MacRonald had been living with Howell on Dominion Avenue when the tragedy occurred. Howell was last seen alive on the morning of June 12, 2023, by her daughter, who returned the following day to find her mother dead on the couch. An autopsy revealed severe trauma to Howell’s face and internal injuries, including broken ribs, inconsistent with a simple fall. Authorities quickly ruled the death a homicide.
MacRonald, who has a documented history of mental illness, initially claimed he found his grandmother injured after hearing a loud noise but could not explain her fatal injuries. His defense team later argued he was legally insane at the time of the killing.
Under Virginia law, insanity defenses require proof that a mental disease or defect rendered the defendant incapable of understanding their actions, distinguishing right from wrong, or resisting an uncontrollable impulse. Two court-ordered evaluations affirmed that MacRonald met this strict standard.
Following the expert findings, MacRonald entered a plea agreement requesting to be found not guilty by reason of insanity. Judge David W. Lannetti accepted the plea and ordered MacRonald to remain in custody for further evaluation. The Virginia Department of Behavioral Health and Developmental Services will assess his mental state and determine whether he needs inpatient treatment or could be released under strict conditions.
“This crime is a triple tragedy,” said Commonwealth’s Attorney Ramin Fatehi. “Ms. Howell is dead, Mr. MacRonald killed her, and their family has lost them both. The law punishes intent, and it cannot punish people who do not understand right from wrong. In this case, the legal conclusion was clear.”
MacRonald’s case underscores broader concerns about the intersection of mental illness and the criminal justice system. Despite the outcome here, many individuals with mental health conditions are found guilty and incarcerated daily. Fatehi acknowledged this systemic failure, highlighting the challenges in addressing severe mental illness before tragedies occur.
Further hearings will monitor MacRonald’s progress and the state’s recommendations on his treatment and potential risks.