Sentencing set in connection with fatal opioid overdose

  • St Mary's County,Calvert County
  • By

Mark Steven Garner II

Leonardtown, MD- A Prince Frederick man is scheduled to be sentenced for his connection with a fatal opioid overdose in August of 2016.

Mark Steven Garner II, 29, was charged with second-degree depraved heart murder, involuntary manslaughter, reckless endangerment and conspiracy to distribute narcotics in connection with the overdose death of Barbara Ann Sneden of California (pictured right).

In March,Judge Karen H. Abrams found Garner guilty of involuntary manslaughter, reckless endangerment and conspiracy to distribute. Garner was acquitted of second-degree murder.

Sneden had purchased heroin from Garner in the hours before her death. She was found dead later the same evening inside the Dockside halfway house in California, where she was trying to recover from her drug addiction. The heroin she purchased was found inside a dollar bill on her nightstand.

The state medical examiner’s office ruled Sneden’s cause of death as “heroin intoxication.” Several other therapeutic drugs were also found in her system, but the toxicology report stated those drugs were registered at therapeutic levels.

Garner is also facing a number of charges in Calvert County.

Garner is scheduled for sentencing July 12.

Contact Joy Shrum at

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