ABC News' '20/20' Reports on Woman Who Authorities Maintain Committed Suicide, Family Believes She Was Killed by Deputy Sheriff Boyfriend Airs Today

Suicide or homicide? That question still lingers for Michelle O'Connell's family and friends nearly eight years after she was shot inside her boyfriend's St. Augustine, Florida, home and died. Her family alleges she was killed by her boyfriend, Deputy Sheriff Jeremy Banks, but the sheriff's department maintains that she committed suicide. At the request of Michelle's family, her body was exhumed and an outside forensics expert conducted a second AUTOPSY for them which concluded that Michelle's death was a homicide. However, authorities still maintain she took her own life. ABC News' Ryan Smith investigates the controversy and reports on developments in the case including Jeremy's civil suit against a state investigator that was dismissed in March. "20/20" airs on Friday, June 1 (10:00 - 11:00 p.m. EDT), on ABC.

Firearms expert Peter Diaczuk demonstrates where shell casings could have fallen depending on Michelle's position when she was shot, which also questions the official findings that Michelle shot herself. The hour also features interviews with Michelle's family, including sister Chrissy O'Connell, mother Patty O'Connell and brother Sean O'Connell; Mindy Fox, Michelle's friend; Teresa Woodward, Michelle's former employer; Anne Schindler, the reporter who covered the case extensively; Dr. William Anderson, the forensic pathologist who provided the second AUTOPSY for the family; Mac McLeod, Jeremy's attorney; and Debra Maynard, former St. Johns County deputy sheriff.

On September 2, 2010, Jeremy called 911 saying he found Michelle shot inside his home. Although police quickly determined it was a suicide, Michelle's friends and family insisted that she would not take her own life. After pressuring the sheriff's department to hand the case over to an outside investigator, the Florida Department of Law Enforcement (FDLE) stepped in and spoke with family and friends who said they believed Jeremy is responsible. They claimed Michelle and Jeremy's relationship was abusive and that it became violent the night Michelle died as she was packing up to leave Jeremy. The FDLE also UNCOVERED new witnesses, and its investigation pointed toward homicide. Still, the state attorney said they had no criminal case against Jeremy. In his autopsy, Dr. Anderson discovered that Michelle's jaw had been broken prior to her death. His report to THE FAMILY states that she was first attacked and incapacitated, and then shot and killed by someone else; but the official cause of death remains suicide. Following the FDLE investigation, Jeremy filed a civil lawsuit against that outside investigator, alleging his civil rights had been violated. But in March, the case was dismissed. Jeremy has never been charged and maintains he was not involved in Michelle's death.

"20/20" is anchored by David Muir and Amy Robach. David Sloan is senior executive producer.

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