There is a route from Fairview to JOK's house that would not have involved going past the library. I'd call it the "Pleasant St route". JOK's house is at the corner of Pleasant and Meadows.
How fast KR could have (and did) get from Fairview to Meadows may be a more directly contested issue in this trial. From Brennan's statements at the 3/20 hearing, the CW is going to attempt to nail down, with additional device data, that the fatal collision happened shortly after JOK exited the Lexus. In doing so, the CW may have to acknowledge that the collision happened somewhat later than it was willing to concede at the first trial, possibly as late as 12:32.
In Jackson's closing argument, he asserted that it was "undisputed" that the drive from Fairview to Meadows would take six minutes. This was an instance of counsel asserting a fact not in evidence; obviously, how long the drive takes is subject to driver decisions and discretion. The CW avoided the issue, but may have to take it on directly in this trial.