HFS+ Last Access Times

Hi All,
In looking through an Apple computer and all I see are Created and Last modified times, I find this odd that when putting the drive in FTK or Encase it is able to show last access times. When using MacForensicsLab or just parsing through as a mounted drive the last access times are no where to be found. Has anyone have any information regarding where these last access times are coming from and why Encase and FTK can pull them but not MacForensicsLab. Is there a way to access them on the Apple system? Encase and FTK have both said they do not know where the last access times are pulled from.