San Francisco Oakland San Jose, CA, September 19, 2026 —

Wesley Shermantine, a figure associated with the notorious “Speed Freak Killers,” has died in prison. He was 60 years old at the time of his death.

The circumstances surrounding Shermantine’s death have not been fully detailed, but his passing marks the end of a life largely defined by severe criminal activity. Shermantine and his accomplice, Lorenso Mixon, were convicted in connection with a series of murders that occurred in Mississippi in the late 1990s. The duo became known by the moniker “Speed Freak Killers” due to their methamphetamine use and the brutal nature of their crimes.

Shermantine was serving a life sentence after being convicted of murder charges. The investigation into the “Speed Freak Killers” brought to light a disturbing pattern of violence that terrorized communities in the region. While the summary provided does not include specific dates of conviction, the timeline of the crimes is generally understood to have occurred around 1997 and 1998.

The legal proceedings following their apprehension involved extensive investigations and trials. Shermantine’s conviction was a significant outcome of these efforts, bringing a measure of closure to the families of the victims, though the impact of the crimes continued to resonate. The contractor’s name involved in his case was not provided in the summary. Information regarding any specific code violations or inspection outcomes related to his incarceration is also not available in the provided details.

Shermantine’s death in prison means he will not face further legal proceedings related to the crimes for which he was convicted. The exact cause of his death and any other associated details during his time in incarceration were not specified in the initial report. The fate of his accomplice, Lorenso Mixon, and any other individuals potentially involved or affected by the “Speed Freak Killer” case remains a matter of public record and ongoing interest for those tracking the history of crime in the region.

The full scope of Shermantine’s involvement in the “Speed Freak Killer” activities and the ultimate number of victims were pieced together through extensive law enforcement work. His passing closes a chapter in a case that shocked many and highlighted the devastating consequences of drug addiction coupled with violent tendencies.


Story summarized from the original created by KGO on abc7news.com, see more information here.

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