As late as 12/23 a DPD evidence report has Baker running into LHO on the stairway on the third or fourth floor.

Captain Fritz wrote this for Chief Curry, Mr Craig. He's still stuck in Script A mode here, recounting the
original story DPD were going to run with.
Captain Fritz's wording (
'while coming down the stairs... on the stairway') makes clear what Baker's affidavit 'walking away from the stairway' was meant to convey:
The man was coming off the stairway when Officer Baker ran into him.Nothing like the lunchroom story that subsequently... 'emerged'!