SAN LUIS OBISPO, Calif.  On a winter night in 2006, a disabled and brain damaged man named Ruben Navarro was wheeled into an operating room at a hospital here. By most accounts, Mr. Navarro, 25, was near death, and doctors hoped that he might sustain other lives by donating his kidneys and liver.

But what happened to Mr. Navarro quickly went from the potentially life-saving to what law enforcement officials say was criminal. In what transplant experts believe is the first such case in the country, prosecutors have charged the surgeon, Dr. Hootan C. Roozrokh, with prescribing excessive and improper doses of drugs, apparently in an attempt to hasten Mr. Navarro’s death to retrieve his organs sooner.

A preliminary hearing begins here on Wednesday, with Dr. Roozrokh facing three felony counts relating to Mr. Navarro’s treatment as a donor. At the heart of the case is whether Dr. Roozrokh, who studied at a transplant fellowship program at the Stanford University School of Medicine, was pursuing organs at any cost or had become entangled in a web of misunderstanding about a lesser-used harvesting technique known as “donation after cardiac death.”

Dr. Roozrokh has pleaded not guilty, and his lawyer said the charges were the result of overzealous prosecutors. But the case has sent a shudder through the tight-knit field of transplant surgeons  if convicted on all counts, Dr. Roozrokh could face eight years in prison  while also worrying donation advocacy groups that organ donors could be frightened away.