Tracy is a dedicated Seattle homicide detective whose career was forged by the trauma of her younger sister's disappearance twenty years ago. Formerly a high school chemistry teacher known as "The Professor," she relies on logical deduction and hard evidence. She experiences severe emotional isolation as she balances her active Seattle cases with an unyielding desire to find the truth about her hometown tragedy.

Edmund is a convicted criminal serving a life sentence at Walla Walla State Penitentiary for the murder of Sarah Crosswhite. He presents himself as a misunderstood victim of a small-town frame-up and agrees to cooperate with efforts to review his conviction. Physically transformed by his time in prison, he uses his intelligence to assert his innocence.

Roy Calloway is the veteran sheriff of Cedar Grove, having served the community for over three decades. He led the original 1993 investigation into Sarah's disappearance and views himself as the town's ultimate protector. He becomes highly defensive of his past investigative work when Tracy arrives to observe the excavation.

A childhood friend of Tracy's who has returned to Cedar Grove to practice law after experiencing a painful divorce in Boston. He recently renovated his childhood home and cares for his two large dogs. He provides crucial legal expertise and emotional support as he helps Tracy review the twenty-year-old case files.

Tracy's younger sister, who disappeared twenty years ago at the age of eighteen. Known in shooting competitions as "The Kid," she is vibrant and deeply devoted to her older sibling. The unearthing of her remains serves as the primary catalyst for the present-day events.

Tracy and Sarah's father, a respected local doctor. Driven to despair by Sarah's disappearance, he desires a swift conviction to bring his family closure. The immense grief over losing his daughter ultimately leads to his death by suicide.

The County Prosecutor who handled the original trial that convicted Edmund House. He remains highly anxious about the reopening of the case and the potential for new forensic evidence to contradict his past legal victories.

A traveling salesman whose testimony about seeing a red truck was crucial in securing the search warrants against Edmund House. His credibility comes under scrutiny when Tracy and Dan begin reviewing the old case files.

Edmund House's uncle, who owns a remote mountain property and a furniture-making business in Cedar Grove. He allowed authorities to search his property during the original 1993 investigation.

An elderly and frail attorney who served as Edmund House's original defense counsel. During the trial, his cross-examinations were notably brief and ineffective, raising questions about the quality of his client's defense.

A meticulous forensic anthropologist tasked with excavating and analyzing the remains found near Cedar Grove. She utilizes modern scientific techniques to uncover details about the burial process.

Tracy's partner in the Seattle Homicide Division. He suffers from a degenerative hip injury from his football days but remains a reliable and supportive colleague.

Tracy's boyfriend at the time of Sarah's disappearance, and later her ex-husband. He finds it increasingly difficult to cope with Tracy's consuming obsession with her sister's unsolved case.

A deputy in the Cedar Grove Sheriff's Office who assists Sheriff Calloway. He acts as an escort and official presence during the excavation and the subsequent legal hearings.

Tracy and Sarah's mother. Following Sarah's disappearance, she attempts to coordinate volunteer search efforts while dealing with the sudden fracture of her family.

Tracy's hostile superior at the Seattle Police Department. He views her independent investigation into her sister's case as a public relations liability.

One of Dan O'Leary's large, protective dogs. He provides companionship to Dan and inadvertently becomes caught in the crossfire of the escalating tensions surrounding the reopened case.

A local father whose daughter, Annabelle, was brutally assaulted by Edmund House years prior to Sarah's disappearance. He visits Dan to plead against reopening the criminal case.