Investigators say they are about two weeks away from determining the cause of Pimp C's mysterious death.

As previously reported, 33-year-old Pimp C, one-half of the legendary Southern rap duo UGK, was found dead in an upscale Hollywood hotel room on Dec. 4.

While the rapper was found with drugs on his person, prescribed to him by his doctor, without apparent injury and no drug paraphernalia present, authorities believed he died of natural causes.

According to KBTV Channel 4 in Port Arthur, Pimp C's hometown, the Los Angeles coroner's office has officially ruled out foul play and said there were no signs of trauma.

Pimp C's funeral was held on Dec. 13 and drew about 2,000 attendees, including Houston rappers Chamillionaire, Mike Jones, Slim Thug and longtime partner and friend, Bun B.