Nichols was formally indicted on February 1st, 1989. A mental health evaluation in July 1989 found him incompetent to stand trial. On January 6th, 1989, the day after his arrest, Nichols also told his wife Joanne what he had done. She had no prior knowledge of any of it. The trial of Harold Wayne Nichols opened on May 7th, 1990, in Hamilton County Criminal Court.
Because of the significant public attention surrounding the case, the court granted a change of venue for jury selection only. Jurors were brought in from Sumner County. The trial itself remained in Hamilton County. Defense attorneys Hugh J. Moore, Jr., and Rosemary Bryan moved immediately to suppress the videotape confession, the single most damaging piece of evidence against their client.
The court denied the motion. With that ruling, the tape was going before the jury regardless. Nichols changed course. He entered guilty pleas to first-degree felony murder, aggravated rape, and first-degree burglary. The case moved directly into the sentencing phase. The question before the jury was straightforward, life or death.
District Attorney Steve Bevel led the prosecution. He presented two statutory aggravating circumstances under Tennessee law. First, Nichols had five prior convictions for aggravated offenses against four separate victims. Second, Karen Polly’s murder occurred during the commission of a felony burglary. Hamilton County Court Clerk Harold Rowan formally introduced the conviction records into evidence.
The defense called several witnesses. JoAnn Nichols testified about her husband’s character and described their marriage as genuinely happy. Larry Kilgore, Nichols’ closest friend, told the court he was the best person he had ever known. Three reverends also testified. Reverend Butler stated that Nichols had been operating under the influence of an evil spirit.
Though on cross-examination, he acknowledged Nichols had never once sought help for this. Reverend Gonia described Nichols as a good child who remained a good person. Reverend Hawkins had known Nichols personally at the Tomlinson Children’s Home and had visited him in jail after his arrest. He told the court the man he saw behind bars reminded him of the young boy he had once known.
Nichols took the stand himself. He told the jury he understood that what he had done was wrong and terrible. He said a strange feeling had compelled him and that he had been unable to stop it. He insisted he had not intended for Karen Polly to die. Then he addressed her family directly. He said, “I wish that there was something I could do to change the things that happened.
I know Miss Polly’s family is hurting, and I’m not asking them for forgiveness. I don’t expect that. But if I could change places with Karen, I would.” On cross-examination, the prosecution asked him plainly whether he would have continued had he not been arrested. He said yes. In his closing argument, District Attorney Bevel stood before the jury and displayed two images.
The first was an enlarged portrait of Karen Pulley, labeled September 29th, 1988. The second was an image from the crime scene, labeled September 30th, 1988. He asked the jury to show Harold Wayne Nichols the same mercy he had shown her. On May 12th, 1990, after deliberating for less than 2 hours, the jury returned a verdict of death.