Defense attorneys had challenged whether Charles McCoy Jr. voluntarily waived his rights when he talked to authorities. McCoy is accused in 12 shootings from last October through February that took place mainly along the Interstate 270 outerbelt on the south side of Columbus. The only person hit was a 62-year-old woman killed in November.

Mark Collins, one of McCoy's attorneys, called McCoy's statements "innocuous" and said he is instead focusing on McCoy's medical state at the time of the shootings. McCoy has paranoid schizophrenia, according to court documents and his attorneys.

In September, McCoy changed his initial plea of innocent to innocent by reason of insanity. He is charged with 24 counts, including aggravated murder and murder.

"At the time we made our motion to suppress, our medical information was incomplete. Now that we've changed our plea to not guilty by reason of insanity, the statements he made are now a minor portion of the case," Collins said.

McCoy, who is being medicated while in jail, is set for trial Jan. 7.