While toxicology test results for drugs and alcohol are still pending, new details regarding the mysterious circumstances surrounding his death are emerging.

Showers reportedly suffered from depression and anxiety and was diagnosed with multiple sclerosis in March, according to the Times-Picayune.

The actor's girlfriend, Melinda Carlos, provided those details and more to authorities following Showers' death, shedding some light on his whereabouts prior to the discovery of his body.

Showers reportedly left the couple's home Monday to meet a friend named "Joe" at a local gym and never returned. When Showers failed to respond to calls and didn't come home, Carlos called police Tuesday to report that he was missing.

The sheriff's office told the Times authorities are looking for "Joe", whom Carlos had never met. They are also still on the hunt for Showers' car, which has yet to be found.

The body of the late actor, who played Capt. John Guidry on the HBO series, was discovered Wednesday morning in waters near New Orleans' French Quarter.

At the time, the Orleans Parish Coroner's Office said Showers' body had been in the water for two days.

"Michael Showers was a fine actor who contributed his talents to our drama in the warmest and most professional way," said Treme executive producer David Simon on behalf of his cast and crew.

"We enjoyed his work, and working with him," Simon said. "Going forward, we're going to miss having him as part of our production—all of which seems of little import in light of the loss of a man's whole life, and what that loss truly means to him, his family, his friends. Our respect and condolences go to them, especially."