Gemmel Moore, 26, was found dead in West Hollywood, CA on July 27

Homicide detectives have re-opened an investigation into the overdose death of a man at a prominent Democrat donor's home after receiving 'additional information'.

Speaking on Monday, LA County Sheriff Jim McDonnell refused to comment on the nature of the new information in connection with the death of Gemmel Moore on July 27.

He was found dead at the West Hollywood home of prominent Democratic donor Ed Buck.

LA County Coroner's office said Moore's death, as a result of an overdose of methamphetamine.

According to the LA Times, the initial investigation into Moore's death seemed to support the theory is death was not suspicious.

However, Captain Chris Bergner said the new investigation was being conducted 'out of abundance of caution'.

Yet, Mr Buck's attorney Seymour Amster maintained his client had 'nothing to do with this young man's death'.

Moore's mother LaTisha Dixon said she wants to find out the truth behind her son's death, claiming he had been working as a sex worker for several years.

Ed Buck (Pictured) has been a high-profile Democratic donor for decades (Pictured June 2015)

Buck pictured with California Governor Jerry Brown (Pictured November 2010)

'I called one of my son’s friends and was like, "who the hell is Edward Buck?'" Nixon said, speaking from her home in Spring Texas. 'And my son’s friend was like, "oh my God, that’s that white guy, that wealthy white politician guy… he was like "oh my God…’”

A one-time registered Republican, Buck began getting involved in Southern California politics in the early 1990s.

Buck became a successful businessman, pioneering in computer technology, specifically in electronic information services, in Arizona before moving to Los Angeles.