“Depraved Heart Murder” examined by Sarah Harris in “48 Hours.”

Sarah Harris's life seemed idyllic from the outside: She was 25 years old, had just won the Miss Maryland Petite Pageant and had suddenly received a dream job offer.

But according to a new report, something more sinister was at play 48 hours report in an episode titled “The Depraved Heart Murder,” airing Saturday, October 5 at 10 ET/PT.

The episode examines Harris' death in 2022, when first responders discovered she was dead after an overdose at the home of her friend Dr. James Ryan was found unresponsive in Montgomery County, Maryland.

“This was not a simple, accidental overdose. “It was much more than that,” said Ian Iacoviello, special agent in charge of the Montgomery Police Department and lead investigator in the Harris case, in a preview of the episode shared by CBS this week.

CBS' new 48 hours The episode features extensive interviews with several investigators, including Iacoviello, as well as Harris' mother, Tina Harris, who says she “never imagined” her daughter's life could have ended like this.

According to Iacoviello, Harris was an “incredibly smart, very energetic, very funny” 25-year-old.

The former Maryland beauty pageant winner met Ryan after she was a patient at his oral surgery practice, and he continued to contact her after she had her wisdom teeth removed, according to Harris' family.

Harris had hoped to work in the medical field and expressed an interest in anesthesiology.

“From a young age, she thought she wanted to be a doctor,” says her mother 48 hours. “She wanted to help people.”

When Ryan, now 51, texted his former patient and asked her if she knew anyone who wanted to be a surgical assistant, Harris asked her mother, “Why not me?”

She started working with Ryan and later decided to move in with him after they met.

“Many people knew him and thought highly of him,” says the detective.

But an investigation into Ryan's relationship with Harris revealed something more concerning, they say 48 hours'Trailer for the episode. The doctor soon became a suspect in Harris' death after investigators discovered he was supplying her with medications from his doctor's office, local Maryland station NBC4 previously reported.

According to Iacoviello, he gave her drugs to control her.

Ryan, Iacoviello said 48 hours“created an addict.” And social worker Ann Miller, who testified for the prosecution, said: “She was chemically dependent on him.”

Miller adds: “He viewed her as an object…not a person with whom one could be in an equal relationship. And if that's true, then he entered into this relationship not with the idea that they could have an equal relationship, but that he could control her.

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Ryan was ultimately convicted of “depraved heart murder,” a rare conviction that prosecutors reached by arguing he had shown “an extreme indifference” to her life, CBS News previously reported.

Harris' father, Mark Harris, once told NBC4 that she was “a caring, loving daughter, sister, granddaughter, aunt and friend.”

“Sarah was the shining star in our lives,” he said.

CBS' 48 hours airs Saturday, October 4 at 10 a.m. ET/PT

If you or someone you know is struggling with addiction, please call the SAMHSA Substance Abuse Hotline at 1-800-662-HELP.