A 35-year-old man admitted Tuesday that he gave heroin to a Pasco man who ended up dying from the drug.

Brian Haney Burt entered his second guilty plea in a case that police and prosecutors say ultimately involved the deaths of five people. However, Burt's plea agreement in Franklin and Benton counties is only for two people -- a 21-year-old man and a 44-year-old grandmother.

His admission Tuesday in Franklin County Superior Court to controlled substance homicide is for the death of Derek Scott Bradley.

Burt brought heroin to Bradley's home sometime between June 30 and July 2, 2010, and the two injected the drug together. Burt later found Bradley "cool to the touch and getting stiff" and panicked, running from the home without getting help, court documents said.

Burt pleaded guilty earlier this month in Benton County Superior Court to another count of controlled substance homicide. That was for the May 2010 death of Shirley Sanders.

A second charge for Liam D. Hermsen's death in November 2009 was dismissed as a part of the negotiations.

Authorities also allegedly linked Burt to Jason Brickey's death in October 2008, but were barred by the statute of limitations from charging him with it because the death was more than three years old.

Documents also suggested that he may have been connected to the May 2009 death of Natasha Eubanks of Pasco.

Burt has told Richland police that he knew people were dying from his "high-quality" heroin, yet he kept delivering it to feed his own addiction.

He was arrested in April after Richland's Proactive Anti-Crime Team stopped the car he was in when they saw Burt toss a cigarette out a window. During his interview later at the police station, Burt identified a number of people in recent years who had overdosed from heroin he had either provided or sold, describing the circumstances leading up to each death.

The case in each county was under a rarely used law that says a person can be charged for unlawfully delivering a controlled substance that kills someone.

Under the plea agreement, Burt will likely spend five years in prison.

He is set to be sentenced today in Benton County, with Franklin County's sentencing tentatively set for next week. The sentences will be served at the same time.