From a reliable source:
"Some excerpts from IRMI and PMPT
[IRMI = JonBenet: Inside the Ramsey Murder Investigation,
PMPT = Perfect Murder Perfect Town]
In the following days, we documented the whereabouts of John Andrew Ramsey on the night his little stepsister was killed. Although the family had been of minimal help, Gosage and I backtracked through interviews, records, friends, and associates to put him officially in the Atlanta-Marietta area, except for about six hours when he was presumably asleep at his mother’s home. Unless there was a far-reaching conspiracy or a Harrier jet in the backyard, he didn’t do it.
also
On the last day of the month, I wrote in an exhaustive report that “one can conclude John Andrew Ramsey’s whereabouts have been reasonably accounted for.” A few days later the city spokesperson announced that both John Andrew and his sister Melinda had been cleared of suspicion.
JonBenet: Inside the Ramsey Murder Investigation
Detective Kim Stewart interviewed Melinda for almost two and a half hours. Detectives Ron Gosage and Steve Thomas questioned her brother from 6:00 to 8:00 P.M.
Twenty-year-old John Andrew was obviously upset, but he was composed enough to explain that he was a student at CU and had been in Boulder until December 19. Then he had gone to Atlanta to spend the first part of his vacation with his mother, Lucinda Johnson, and his sister and friends. Then the plan was to continue his vacation with his sister, father, stepmother, and their children. He said his father had arranged to meet him and his sister in Minneapolis at about 10:30 A.M. on December 26, and from there they would all continue to the house in Charlevoix, Michigan.
In the months that followed, the police would confirm that John Andrew, his mother, and her friend Harry Smiles had attended the Peachtree Presbyterian Church in Atlanta on Christmas Eve and that John Andrew had returned to his mother’s home at 1:00 A.M.
Melinda, who worked at a hospital in Marietta, Georgia, finished her shift at about 7:00 A.M. on Christmas Day. That afternoon, John Andrew, Harry Smiles, Melinda, and her boyfriend, Stewart Long, exchanged gifts at Lucinda’s home in Marietta. In the afternoon they all went across the street to a neighbor’s for dinner.
Melinda and Stewart Long left the dinner party about 7:00 P.M., and Melinda started to pack for an early flight the next day. At 9:00 they went to visit Guy Long, Stewart’s uncle, and after visiting other friends were home by midnight.
At about 8:30 P.M., John Andrew went to his friend Brad Millard’s home in Marietta to play video games. After an hour, they left to catch a 10:30 show at the Town and Country Movie Theaters in Marietta with another friend, Chris Stanley.
John Andrew said that after the movie he went back to Brad Millard’s house to get his car and arrived back at his mother’s house at 1:00 A.M. The next morning he left his mother’s house with Melinda, who had come there to pick him up. Together they boarded a flight to Minneapolis at 8:36 A.M. local time. That was forty-four minutes after Patsy called 911 to report that JonBenét was missing.
Could John Andrew, with one or more of the friends who provided his and his sister’s alibis, have left Marietta, Georgia, flown to Boulder, Colorado, and returned in time to be seen by his sister’s boyfriend, Stewart Long, at about 6:15 A.M. when John Andrew and Melinda left for the airport?
The police figured that John Andrew had a minimum of four and a half hours he could not account for—longer if he didn’t stay to see the entire movie. It would have been longer still if he never went to the theater but went to an airport instead. That scenario would give John Andrew almost nine hours to get from Marietta to Boulder and back. Until all airline and private plane flights were checked, John Andrew Ramsey would remain a suspect.
and
For seven weeks the police had been interviewing the Ramseys’ family, friends, and business associates without turning up any real suspects. They had finished their background checks on John Andrew and Melinda and had verified commercial airline schedules and private plane flight plans and found no record that either of them had traveled the night of December 25. Their alibis were solid. Besides the Ramseys, the only people apparently still under investigation were “Santa” Bill McReynolds and his wife, Janet; housekeeper Linda Hoffmann-Pugh; part-time reporter Chris Wolf; Bud Henderson, who owed $18,000 to Access Graphics; company executive Gary Merriman; and the Ramseys’ friends Fleet and Priscilla White.
and
Two and a half months after the Boulder police began investigating John Andrew and Melinda Ramsey, they received the final pieces of evidence that cleared Ramsey’s older children of any involvement in JonBenét’s murder. Bryan Morgan wrote to Detective Thomas on March 4 stating that John Andrew had made an ATM transaction at the QT Store on Roswell Road, in Marietta, Georgia, at 9:00 P.M. on December 25. His friend Brad Millard had been present. To support his claim, Morgan enclosed the ATM transaction slip. He also repeated that Melinda had awakened her brother in the early morning hours of December 26, in time for him to stop at a store and still make an 8:30 A.M. flight to Minneapolis. It was impossible for John Andrew to have flown from Atlanta to Boulder, whether by commercial or private aircraft, commit the murder, and return in time to be awakened by his sister in the presence of Brad Millard, who had stayed overnight in John Andrew’s room.
Perfect Murder, Perfect Town"
That is the situation my new theory faces. Can we ever prove that these alibis are false? What proof do we have that Melinda really did wake JAR up that morning?