COMING UP ON 48 HOURS MYSTERY: FAMOUS CRIME WRITER HELPS A MOTHER SEEK JUSTICE IN THE DEATH OF HER DAUGHTER

"MYSTERY ON TWIN PEAKS DRIVE" SATURDAY, APRIL 21 (10:00 PM, ET/PT)

Ron and Ronda Reynolds; Ann Rule

On the morning of Dec. 16, 1998, Ron Reynolds discovered the lifeless body of his wife, Ronda Reynolds, who had suffered a gunshot wound to the head. Authorities quickly ruled Ronda's death a suicide. There had been trouble in the marriage, including reported difficulties with Ron's son, Jonathan. But Ronda was planning to move on and was looking forward to the next phase of her life. Refusing to accept her daughter killed herself, Ronda's mother, Barb Thompson, launched her own investigation, firmly believing that "someone in that house killed my daughter." Thompson enlisted the help of world-famous true crime author, Ann Rule, to help find out what really happened.

"The first time I heard about Ronda Reynolds' death I felt a tingling at the back of my neck," said author Rule. "Something wasn't right. As I've often written, there is indeed such a thing as the perfect murder."

After more than a decade of legal wrangling, Thompson received news in 2011 that Washington authorities would revisit the case by holding a coroner's inquest, a rare and unusual proceeding, to determine the cause of death and who might be responsible.

48 HOURS MYSTERY correspondent Peter Van Sant talks with Thompson and Rule about their lengthy quest for justice. Rule - who has more than 30 million books in print worldwide - wrote a bestseller titled In the Still of the Night about Ronda's case. The broadcast features interviews with Ron and Jonathan Reynolds, who have both endured public scrutiny over their alleged involvement in Ronda's death. Additionally, Van Sant speaks with several law enforcement officials who express their opposing views on the cause of Ronda's death.

The primetime broadcast entitled "Mystery on Twin Peaks Drive," will air on Saturday, April 21 (10:00-11:00 PM, ET/PT) on the CBS network.

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