Here's what Schiller had to say about the gardener, Brian Scott, in his book Perfect Murder Perfect Town (pb).
Pg 266-267:
"The next day, on February 24, Detective Arndt reinterviewed the Ramsey's gardener, Brian Scott. She had spoken to him earlier in the month.
"Scott, who had graduated from the University of Colorado the year before, told the detective that he'd started working for the Ramseys in June 1995 as a landscaper. The last time he was at the house was December 10. The family used large wooden candy canes to decorate the yard during the holidays, and he noticed that they hadn't been arranged properly. They needed deeper holes, which he dug before pounding them into the ground. Detective Arndt asked him what he remembered about the window-well grate near the rear patio. Scott said he didn't remember that the window was broken. He'd only been in the basement to fix the sprinkler clock. He didn't know there was a wine cellar, much less where it was. He did recall a broken window at the front of the house, but it was for the electrical cord for the Christmas lights and certainly not big enough for someone to crawl through -- something like 2 inches square.
"While Scott adjusted the candy canes along the front walk, he saw a blue Chevy Suburban pull up to collect JonBenet. She was wearing a pair of blue overalls and was being bratty about something. I think she might have been giving orders, Scott said, like, You get in the back. You do this. Something like that. A moment later the car was gone. That was the last time he saw JonBenet.
"On December 25, Scott went to the apartment of his girlfriend, Ann Preston, at around 10:30 P.M. and stayed until just past midnight, then went home alone. There was nobody to confirm his alibi for the rest of the night. Arndt asked him for a handwriting sample, and two weeks late he gave police blood, saliva, and hair samples as well. Only then did he feel he was a suspect."
pg 446-447:
"Meanwhile, Steve Ainsworth met with detective Jane Harmer to discuss several possible suspects the police might want to look at again. The Ramsey's gardener, Brian Scott, came up. Detective Arndt had interviewed him in February, but she was no longer working on the case. Ainsworth thought Scott's alibi should be rechecked and that he might be able to describe the condition of the grate covering the broken basement window. Harmer reinterviewed Scott, showing him two photographs taken just after the murder. One was of a bushel basket with some weeds in it, and the other was of the window grate. To the police, the ground cover around the grate looked as if it had been disturbed -- perhaps because the grate had been lifted up. Looking at the photographs, Scott said it looked as if the ground cover had grown underneath the grate, which indicated it had been lifted, but he couldn't tell when. It could have been in September-October, when Ramsey said he entered the house by that broken window, or as late as December, when JonBenet was murdered.
"two weeks later, Harmer spoke to Scott's girlfriend, Ann Preston, to reconfirm when Scott had left her place on Christmas night. She said it was around 12:30 A.M. Scott's saliva, hair, and handwriting samples would have to be analyzed before he was cleared."
JMO