Who killed Michael Dennis Siau? Michael D. Siau, a 38-year-old White man, was found dead in Alexandria, Louisiana, after a morning discovery that turned an ordinary stretch of roadway into a crime scene. A jogger came upon his body lying in a ditch along Plantation Drive near Hot Wells Road, and investigators quickly determined his death was not accidental. The injuries pointed to a violent beating, the kind that leaves more questions than answers in its wake.
From the outset, authorities treated the circumstances as a homicide, working backward from the ditch where he was left to reconstruct where the assault began and why it happened. The location suggested he had been dumped or abandoned after the beating, and the brutality implied either a sustained attack or a deliberate effort to ensure he would not survive. The sheriff’s office later kept the case among its cold-case files, a sign that the early investigative leads did not result in a clear path to a suspect.
Public records and later postings about him reflect how the timeline remained difficult to pin down precisely in the public narrative. While the sheriff’s office describes the September 26, 1985 discovery and the beating as the key known facts, other memorial sources place his death earlier in September 1985 and connect him to Rapides Parish communities outside Alexandria, underscoring the gap between when he died and when he was found, and the uncertainty that has followed the case for decades.
No publicly available law-enforcement updates tied to the cold-case listing indicate that anyone has been arrested or charged for his killing, and no suspect or suspects are identified in the sheriff’s office summary. With so little released beyond the discovery site and the cause—severe beating—the case has lingered as an unsolved act of violence, preserved in the cold-case archive in the hope that a name, a memory, or a long-delayed tip could still connect what happened on Plantation Drive to the person responsible.
