RISING SUN, Ind. -- A teenager accused of strangling his 10-year-old brother and dumping his body in a park has pleaded not guilty to murder.

Andrew Conley, 17, showed no emotion during Friday's court appearance in Ohio Circuit Court in Rising Sun, the teen's hometown along the Ohio River about 90 miles southeast of Indianapolis.

His parents were at a viewing for his brother Conner Conley's body and did not attend the hearing.

Prosecutors said Conley confessed to police that he intentionally strangled his brother while they were wrestling at the family home on Sunday.

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. He later went to police and admitted to killing his brother, telling investigators where to find the body, police said.

Police said Andrew Conley told investigators he had dreamed of 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.

"Sometimes people are just evil," Dearborn-Ohio County Prosecutor Aaron Negangard said. "This is an evil child."

If convicted of murder, Conley could be sentenced to up to 65 years in prison.