Shortly after the conclusion of the Leach trial and the beginning of the long appeals process that followed, Bundy initiated a series of interviews with Stephen Michaud and Hugh Aynesworth. Speaking mostly in third person to avoid "the stigma of confession", he began for the first time to divulge details of his crimes and thought processes.
He recounted his career as a thief, confirming Kloepfer's long-time suspicion that he had shoplifted virtually everything of substance that he owned. "The big payoff for me," he said, "was actually possessing whatever it was I had stolen. I really enjoyed having something ... that I had wanted and gone out and taken." Possession proved to be an important motive for rape and murder as well. Sexual assault, he said, fulfilled his need to "totally possess" his victims. At first, he killed his victims "as a matter of expediency ... to eliminate the possibility of [being] caught"; but later, murder became part of the "adventure". "The ultimate possession was, in fact, the taking of the life", he said. "And then ... the physical possession of the remains."
Bundy also confided in Special Agent William Hagmaier of the FBI . Hagmaier was struck by the "deep, almost mystical satisfaction" that Bundy took in murder. "He said that after a while, murder is not just a crime of lust or violence", Hagmaier related. "It becomes possession. They are part of you ... [the victim] becomes a part of you, and you [two] are forever one ... and the grounds where you kill them or leave them become sacred to you, and you will always be drawn back to them." Bundy told Hagmaier that he considered himself to be an "amateur", an "impulsive" killer in his early years, before moving into what he termed his "prime" or "predator" phase at about the time of Lynda Healy's murder in 1974. This implied that he began killing well before 1974—although he never explicitly admitted to having done so.
Mug shot taken the day after sentencing for the murder of Kimberly Leach
In July 1984, Raiford guards found two hacksaw blades that Bundy had hidden in his cell. A steel bar in one of the cell's windows had been sawed completely through at the top and bottom and glued back into place with a homemade soap-based adhesive. Several months later, guards found an unauthorized mirror hidden in the cell, and Bundy was again moved to a different cell.
Shortly thereafter, he was charged with a disciplinary infraction for unauthorized correspondence with another high-profile criminal, In October 1984, Bundy contacted and offered to share his self-proclaimed expertise in serial killer psychology in the ongoing hunt in Washington for the "Green River Killer", later identified as . Keppel and Green River Task Force detective interviewed Bundy, but Ridgway remained at large for a further 17 years. Keppel published a detailed documentation of the Green River interviews, and later collaborated with Michaud on another examination of the interview material. Bundy coined the nickname "The Riverman" for Gary Ridgway, which was later used for the title of Keppel's book, The Riverman: Ted Bundy and I Hunt for the Green River Killer.
In early 1986, an execution date (March 4) was set on the Chi Omega convictions; the issued a brief stay, but the execution was quickly rescheduled. In April, shortly after the new date (July 2) was announced, Bundy finally confessed to Hagmaier and Nelson what they believed was the full range of his depredations, including details of what he did to some of his victims after their deaths. He told them that he revisited Taylor Mountain, Issaquah, and other secondary crime scenes, often several times, to lie with his victims and perform sexual acts with their decomposing bodies until forced him to stop. In some cases, he drove for several hours each way and remained the entire night. In Utah, he applied makeup to Melissa Smith's lifeless face, and he repeatedly washed Laura Aime's hair. "If you've got time," he told Hagmaier, "they can be anything you want them to be." He decapitated approximately 12 of his victims with a hacksaw, and kept at least one group of severed heads—probably the four later found on Taylor Mountain (Rancourt, Parks, Ball and Healy)—in his apartment for a period of time before disposing of them.
Less than 15 hours before the scheduled July 2 execution, the it indefinitely and remanded the Chi Omega case for review on multiple technicalities—including Bundy's mental competency to stand trial, and an erroneous instruction by the trial judge during the penalty phase requiring the jury to break a 6–6 tie between life imprisonment and the death penalty—which, ultimately, were never resolved. A new date (November 18, 1986) was then set to carry out the Leach sentence; the Eleventh Circuit Court issued a stay on November 17. In mid-1988, the Eleventh Circuit ruled against Bundy, and in December the Supreme Court denied a motion to review the ruling. Within hours of that final denial, a firm execution date of January 24, 1989, was announced. Bundy's journey through the appeals courts had been unusually rapid for a capital murder case: "Contrary to popular belief, the courts moved Bundy as fast as they could ... Even the prosecutors acknowledged that Bundy's lawyers never employed delaying tactics. Though people everywhere seethed at the apparent delay in executing the archdemon, Ted Bundy was actually on the fast track."
With all appeal avenues exhausted and no further motivation to deny his crimes, Bundy agreed to speak frankly with investigators. He confessed to Keppel that he had committed all eight of the Washington and Oregon homicides for which he was the prime suspect. He described three additional previously unknown victims in Washington and two in Oregon whom he declined to identify (if indeed he ever knew their identities). He said he left a fifth corpse—Donna Manson's—on Taylor Mountain, but incinerated her head in Kloepfer's fireplace. ("Of all the things I did to [Kloepfer]," he told Keppel, "this is probably the one she is least likely to forgive me for. Poor Liz.") "He described the Issaquah crime scene [where the bones of Ott, Naslund, and Hawkins were found], and it was almost like he was just there", Keppel said. "Like he was seeing everything. He was infatuated with the idea because he spent so much time there. He is just totally consumed with murder all the time." Nelson's impressions were similar: "It was the absolute of his crimes that stunned me," she wrote, "his manifest rage against women. He had no compassion at all ... he was totally engrossed in the details. His murders were his life's accomplishments."
Bundy confessed to detectives from Idaho, Utah, and Colorado that he had committed numerous additional homicides, including several that were unknown to the police. He explained that when he was in Utah he could bring his victims back to his apartment, "where he could reenact scenarios depicted on the covers of detective magazines." A new ulterior strategy quickly became apparent: he withheld many details, hoping to parlay the incomplete information into yet another stay of execution. "There are other buried remains in Colorado", he admitted, but refused to elaborate. The new strategy—immediately dubbed "Ted's bones-for-time scheme"—served only to deepen the resolve of authorities to see Bundy executed on schedule, and yielded little new detailed information. In cases where he did give details, nothing was found. Colorado detective Matt Lindvall interpreted this as a conflict between his desire to postpone his execution by divulging information and his need to remain in "total possession—the only person who knew his victims' true resting places."
When it became clear that no further stays would be forthcoming from the courts, Bundy supporters began lobbying for the only remaining option, executive clemency. Diana Weiner, a young Florida attorney and Bundy's last purported love interest, asked the families of several Colorado and Utah victims to petition Florida Governor for a postponement to give Bundy time to reveal more information. All refused. "The families already believed that the victims were dead and that Ted had killed them", wrote Nelson. "They didn't need his confession." Martinez made it clear that he would not agree to further delays in any case. "We are not going to have the system manipulated", he told reporters. "For him to be negotiating for his life over the bodies of victims is despicable."
Boone had championed Bundy's innocence throughout all of his trials and felt "deeply betrayed" by his admission that he was, in fact, guilty. She moved back to Washington with her daughter and refused to accept his phone call on the morning of his execution. "She was hurt by his relationship with Diana [Weiner]," Nelson wrote, "and devastated by his sudden wholesale confessions in his last days."
Hagmaier was present during Bundy's final interviews with investigators. On the eve of his execution, he talked of suicide. "He did not want to give the state the satisfaction of watching him die", Hagmaier said.
Bundy died in the Raiford electric chair at 7:16 a.m. on January 24, 1989. Hundreds of revelers sang, danced and set off fireworks in a pasture across from the prison as the execution was carried out, then cheered as the white hearse containing Bundy's corpse departed the prison. He was cremated in , and his ashes scattered at an undisclosed location in the of Washington State, in accordance with his .
