Rodney King Death Cops Believe Fiancee

6/18/2012 4:32 PM PDT

Cops Believe Fiancee's Story of How Rodney King Died

Police do NOT believe Rodney King's fiancee is hiding information about his death.

Law enforcement sources at the Rialto PD tell TMZ ... they've concluded Cynthia Kelley has been "cooperative and forthright" in her account of the events leading up to Rodney King's death.

As TMZ reported, several of King's friends tell us Kelley changed her story several times -- that she heard Rodney banging on the window at around 5 AM Sunday and then heard him fall in the pool.  The 2 friends spoke with cops, expressing doubt about her story.

Our law enforcement sources say they have no reason to question Kelley's honesty.  As one law enforcement source said, "People in the neighborhood are just speculating."

Our sources say as of now, this is still being investigated as an accidental death with no foul play.  There are no suspects or people of interest.