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Harold Henthorn told friends that his wife Toni had slipped while trying to take a photograph during their hike in September 2012 and fell 50ft. His federal detention hearing came Wednesday as lawyers argued he should await trial behind bars. The coroner could not rule out homicide and the FBI launched an investigation and Henthorn was arrested on Thursday morning. Toni Henthorn had life insurance policies worth $4.5m and two days after her death, a claim was put in for a $1.5m policy, according to reports. In 1995, Henthorn's first wife was also killed in mysterious circumstances. They were changing a tire on a rural road late at night when the car slipped off a jack and crushed her to death, he told authorities. The case, which was initially ruled an accident, has now been re-opened.

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Lawyers will argue Wednesday whether a man accused of pushing his wife off a cliff to her death in Colorado's Rocky Mountain National Park as they celebrated their wedding anniversary should remain in jail. The federal detention hearing comes after Harold Henthorn, 58, was indicted last week on a charge of first-degree murder in the death of Toni Henthorn, 50. An autopsy report says she fell or was pushed over the ledge when she paused to take a photo during a hike on Sept. 29, 2012. The couple was visiting the park for their 12th wedding anniversary. This week, a federal grand jury indicted Harold Henthorn on a charge of first-degree murder more than two years after his wife, Toni, tumbled face first to her death off a ledge in Colorado's Rocky Mountain National Park. Harold is accused of the murder. Happier times: This undated photograph provided by the Bertolet family shows Toni Henthorn. Harold Henthorn, Toni's husband, was indicted by a federal grand jury this week on a charge of first-degree murder more than two years after his wife fell to her death in Rocky Mountain National Park. Only after her death did Toni Henthorn's relatives realize she was covered by three life insurance policies totaling $4.5 million. A claim was sent in for one policy days after she died, court records show. Harold Henthorn's attorney, Craig L. Truman, has said that the case is complicated and that 'justice will be done' once the facts come to light. Loss: His first wife, Sandra Lynn, was killed in a freak accident when their car crushed her as she changed a flat tire. Toni Henthorn was an ophthalmologist with her own practice in Jackson, Mississippi, when she met her husband, who told her he was wealthy and persuaded her to move with him to the Denver suburb of Highland Ranch, her brother, Todd Bertolet told The Associated Press. But once in Colorado, he seemed controlling and obsessed with money, Bertolet said. Toni Henthorn's relatives were not convinced her husband owned his own business, even though he would take regular work trips without explanation. Bertolet said Harold Henthorn was reluctant to talk about the death of his first wife, Sandra Lynn Henthorn, 30, who was crushed to death in 1995 when a car slipped off a jack while she and Harold were changing a flat tire. Reports emerged showing that Dr Henthorn, who had one daughter, had life insurance policies to the value of $4.5 million - and that a claim was made on one of the policies just two days after her death. The indictment says Harold Henthorn, who was the only witness to her death, 'willfully, deliberately, maliciously and with premeditation and malice aforethought did unlawfully kill his wife', CBS reported. After she passed away, it emerged that his first wife had also died in mysterious circumstances, and the investigation into that death has since been re-opened. Sandra Lynn Henthorn, 37, was crushed to death after the couple's car slipped off a jack while she and Harold Henthorn were trying to change a flat tire one late night  in 1995. Frequent hikers: Family photos frequently show the Henthorns enjoying themselves in the rugged landscapes of Colorado--just the type of backdrop of Toni's death. Here the couple are pictured with their daughter. Accused: Harold Henthorn, left, has been accused of murdering his wife, Dr Toni Henthorn, right, who fell to her death while the couple took a hike at Rocky Mountain National Park in September 2012. Watch the full report on CBS Denver here. He told authorities that his wife had been reaching under the car to help him change the front tire on their Jeep Cherokee on the rural road, when the jack slipped. Detectives closed the case just one week after the investigation, ruling the death an accident, but the Douglas County Sheriff's Office told CBS4 that they have now re-opened the investigation. A source told the channel that Henthorn had taken out a $300,000 insurance policy on his wife. It added that three life insurance policies had been taken out on his second wife - each valued at $1.5 million - and that efforts had been made to collect on it on the first business day after her death. One of the policies named the Harold and Toni Henthorn Trust as the beneficiary and a claim was sent in for the policy on October 1, 2012, CBS reported. No payment was made, however. It is not clear who attempted to file a claim for the policy. The claim was made before her body was cremated or a memorial service was held. Dr Henthorn, an ophthalmologist, had been married to her husband for 12 years. She left behind a daughter, then seven. Toni Henthorn's family told CBS4 that they learned of her husband's arrest on Thursday morning. Mystery: Harold Henthorn told authorities his wife slipped on a steep mountainside while taking a photo. Family: Dr Henthorn, a skilled ophthalmologist, left behind a seven-year-old daughter when she died in 2012. Her brother Todd Bertolet expressed relief that federal authorities had made an arrest. 'We've always had the utmost confidence in very talented people with the FBI and the National Park Service,' he said. 'We've always felt that justice would come one day and this is a satisfactory day in knowing that justice for Toni is proceeding along.' Harold Henthorn's attorney, Craig Truman, added: 'We know when all the facts are known in this difficult case that justice will be done.' 'We've always had the utmost confidence in very talented people with the FBI and the National Park Service,' he said. 'We've always felt that justice would come one day and this is a satisfactory day in knowing that justice for Toni is proceeding along.' Harold Henthorn's attorney, Craig Truman, added: 'We know when all the facts are known in this difficult case that justice will be done.' If convicted, Henthorn faces a mandatory life sentence in prison with no possibility of parole and a fine of up to $250,000. Scene: The couple were on an anniversary hike - they had been married 12 years - on Deer Mountain in Rocky Mountains National Park on September 29, 2012 when Dr Henthorn fell to her death. .