Police confiscated marijuana plants as well as a wood-handled pitchfork and hoe into evidence from the home of Rodney King as officials try to determine how he died.

Officials said there were no “outward signs” of alcohol or drug use that may have caused King to fall into the pool Sunday morning.

Investigators are looking into reports by a next-door neighbor who said she heard the 47-year-old King in his backyard sobbing uncontrollably shortly before a splash.

PHOTOS: Rodney King | 1965- 2012

King’s fiancée, Cynthia Kelley, called 911 at 5:25 a.m. after finding King at the bottom of the pool. She told detectives that she was unable to rescue him herself because she is a poor swimmer.

“Even though we’re investigating this as an accidental drowning, we’re looking into every lead," Rialto Police Department spokesman Officer David Shephard said.

An autopsy on King was scheduled for Monday morning, although his cause of death will not be made public until the completion of toxicology tests in six to eight weeks, said San Bernardino County Sheriff’s Department spokeswoman Jodi Miller.

VIDEOS: Rodney King

The toxicology tests and autopsy may determine if King suffered from an undiagnosed medical condition that caused him to lose consciousness or if he had been drinking or was under the influence of drugs.

Police said King’s body showed no signs of trauma, and no traces of blood were found on the concrete pool deck or in the water.

One of King’s neighbors, Sandra Gardea, 31, said she heard a man crying in King's backyard from about 3 a.m. to 5 a.m. King and his fiancée were the only ones at the house at the time, according to police. Gardea also heard King's fiancée trying to coax him back into the house.