Indiana State Police

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FILE - This Feb. 13, 2017, file photo released by the Indiana State Police shows a man walking along the trail system in Delphi, Ind., authorities say is the suspect in the killings of two teenage girls. Indiana State Police released a composite sketch Monday, July 17, 2017, of the suspect. (Indiana State Police via AP, File)

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This composite sketch released Monday, July 17, 2017, by the Indiana State Police shows the man they consider the main suspect in the killings of two teenage girls who disappeared from a hiking trail near their hometown of Delphi in northern Indiana on Feb., 13, 2017. (Indiana State Police via AP)

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FILE - This Feb. 13, 2017, file photo released by the Indiana State Police shows a man walking along the trail system in Delphi, Ind. Indiana authorities said the man is the suspect in the killings of two teenage girls, Liberty German and Abigail Williams, who were found dead Feb. 14 in the woods near Delphi. Mike Patty, the grandfather of one of the two girls slain last month, said Thursday, March 9, 2017, he still believes their killer will be found. (Indiana State Police via AP, File)

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This Feb. 13, 2017, photo released by the Indiana State Police shows a man walking along the trail system in Delphi, Ind. Indiana authorities say the man is the suspect in the killings of two teenage girls, Liberty German and Abigail Williams. He was photographed on the trail system around the time German, age 14, and Williams, age 13, were dropped off Monday Feb. 13, 2017, to go hiking. The photo is from victim Abby German's cell phone that was recovered at the scene of the crime. (Indiana State Police via AP)

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This Feb. 13, 2017, photo released by the Indiana State Police shows a man walking along the trail system in Delphi, Ind. Indiana authorities want to talk to the man in connection with the killings of two teenage girls. He was photographed on the trail system around the time Liberty German and Abigail Williams were dropped off Monday to go hiking. (Indiana State Police via AP)

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This photo released by the Indiana State Police shows Kyle Johnson. A former student at a central Indiana high school and a suspended student have pleaded not guilty to charges alleging they bullied another student in a locker room. The Frankfort Times reports the two, 19-year-old Johnson and 18-year-old Austin Martin, were arrested Monday, May 19, 2014, and bonded out of jail. It's not clear whether either man has hired an attorney. (AP Photo/Indiana State Police)

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This photo released by the Indiana State Police shows Austin Martin. A former student at a central Indiana high school and a suspended student have pleaded not guilty to charges alleging they bullied another student in a locker room. The Frankfort Times reports 18-year-old Martin and 19-year-old Kyle Johnson, were arrested Monday, May 19, 2014, and bonded out of jail. It's not clear whether either man has hired an attorney. (AP Photo/Indiana State Police)

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In this photo provided by the Indiana State Police, emergency crews work at the scene of a massive pileup involving more than 40 vehicles, many of them semitrailers, along Interstate 94, Thursday afternoon, Jan. 23, 2014, near Michigan City, Ind. At least three were killed and more than 20 people were injured. (AP Photo/Indiana State Police)

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In this photo provided by the Indiana State Police, emergency crews work at the scene of a massive pileup involving more than 40 vehicles, many of them semitrailers, along Interstate 94 Thursday afternoon, Jan. 23, 2014, near Michigan City, Ind. (AP Photo/Indiana State Police)

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UPDATES NUMBER OF VEHICLES INVOLVED - In this photo provided by the Indiana State Police, emergency crews work at the scene of a massive pileup involving more than 40 vehicles, many of them semitrailers, along Interstate 94 Thursday afternoon, Jan. 23, 2014 near Michigan City, Ind. At least three were killed and more than 20 people were injured. (AP Photo/Indiana State Police)

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UPDATES NUMBER OF VEHICLES INVOLVED - In this photo provided by the Indiana State Police, emergency crews work at the scene of a massive pileup involving more than 40 vehicles, many of them semitrailers, along Interstate 94 Thursday afternoon, Jan. 23, 2014 near Michigan City, Ind. At least three were killed and more than 20 people were injured. (AP Photo/Indiana State Police)

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In this photo provided by the Indiana State Police, emergency crews work at the scene of a massive pileup involving about 15 semitrailers and about 15 passenger vehicles and pickup trucks along Interstate 94 Thursday afternoon, Jan. 23, 2014 near Michigan City, Ind. At least three were killed and more than 20 people were injured. (AP Photo/Indiana State Police)

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In this photo provided by the Indiana State Police, emergency crews work at the scene of a massive pileup involving about 15 semitrailers and about 15 passenger vehicles and pickup trucks along Interstate 94 Thursday afternoon, Jan. 23, 2014 near Michigan City, Ind. At least three were killed and more than 20 people were injured. (AP Photo/Indiana State Police)

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In this photo provided by the Indiana State Police, emergency crews work at the scene of a massive pileup involving about 15 semitrailers and about 15 passenger vehicles and pickup trucks along Interstate 94 Thursday afternoon, Jan. 23, 2014 near Michigan City, Ind. At least three were killed and more than 20 people were injured. (AP Photo/Indiana State Police)