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Input: Andrew Conley showed no remorse or emotion as he described choking to death Conner Conley as the two wrestled Sunday  a probable cause affidavit said. He told investigators the child's last words were "Andrew  stop."
 Conley said he dragged his brother's body to his car before driving to see his girlfriend  who told investigators the teen "seemed happy  more happy than she had seen him in a while " according to the affidavit. Conley said he dumped the body near a park in his town of Rising Sun  about 90 miles (145 kilometers) southeast of Indianapolis.
 Prosecutors filed preliminary charges of murder against Conley along with a supporting affidavit Thursday. He is being charged as an adult and will appear Friday in court  Negangard said.
 Conley's family did not return messages for comment Thursday. Negangard said Conley had an attorney but none was listed in the affidavit.
 The teen told investigators he had had fantasies about killing someone since he was in eighth grade  including cutting somebody's throat  and felt "just like" the serial killer Dexter on the Showtime television series of the same name.
 Negangard said he will consider seeking the maximum prison term of life without parole. Conley's age makes him ineligible for the death penalty.
 The teen had no juvenile record and his teachers considered him a good student  Negangard said.

US teen charged with strangling brother 10