Robert Charles Browne

On July 27, 2006, in a similar plea agreement, he confessed to the death of Rocio Delpilar Sperry, 15, who was killed on November 10, 1987, at an apartment complex. Sperry's body has never been recovered.

Browne was arrested on March 28, 1995, on the charge of first-degree murder for the September 17, 1991, killing of Heather Dawn Church, 13. Although he initially pleaded not guilty to the charges, on May 25, 1995, in a plea agreement, he changed his plea to guilty so that prosecutors would not seek the death penalty.

In his confession, authorities say Browne admitted to murdering up to 48 other people in a period spanning from 1970 until his arrest. Browne instigated a new investigation by sending a cryptic letter to the authorities in 2000. The letter read, "Seven sacred virgins entombed side by side, those less worthy are scattered wide, the score is you 1, the other team 48." The letter included a hand-drawn map with outlines of Colorado, Washington, California, New Mexico, Texas, Oklahoma, Louisiana, Arkansas and Mississippi, with a number written inside each state.

Browne was born in Coushatta, Louisiana. According to a Red River Parish sheriff, Browne grew up as one of nine children in a hardscrabble family. He was a high school dropout who joined the United States Army and served from 1969 to 1976, when he was dishonorably discharged for drug abuse.

Robert Charles Browne (born October 31, 1952) is an American man convicted of two murders and serving a double-life sentence in the Colorado Territorial Correctional Facility. Browne is also a self-professed serial killer, alleging that he killed 48 people, mostly women, as well as an additional woman in South Korea during his time in the US Military. Though many claims made by Browne remain uncorroborated, if accurate his account would make him one of the most prolific serial killers in American history.