A lot of people "worked there" but Oswald was the only employee to leave his prints on the boxes.
Means nothing. Lee picks books out of boxes. There are also unidentified prints on those boxes.
A multitude of different sources link Oswald to the rifle including his prints.
Oswald's prints on the rifle are garbage. Found only after Oswald was dead.
No other person has ever been linked to that rifle by ANY evidence.
Conclusively true, and that includes Oswald.
No other employee left the building and never reported again.

Here is a list.
Lee was NOT the only employee to leave the building and not return.
The following employees also did not return to work after the assassination.

Jack Charles Cason President of School Book Depository left building at 12:10 p.m. and went home (22H 640)
Gloria Jean Holt clerk at TSBD does not return after shooting. (19H 526 | 22H 652)
Sharon Simmons Nelson, Secretary, does not return after shooting. (Ibid)
Bonnie Richey, Secretary, does not return after the shooting. (22H 671)
Carolyn Arnold does not return after shooting. (22H 635)
Mrs. Donald Baker, Clerk, does not return after shooting. (22H 635)
Judy Marie Johnson does not return after shooting. (22H 256)
Ms. Stella Mae Jacob does not return after shooting. (22H 665)
Virginia H. Brnum McGraw-Hill employee, does not return after shooting. (22H 636)
Vida Lee Whately Clerk, does not return after shooting. (22H 680)
Warren Caster, ate lunch in Denton. (22H 641 | 26H 738)
Spaudlin Pud Jones, eating lunch at Blue Front with Herbert. (22H 658)
Herbert L. Junker McMillian employee, (22H 659)
Mrs. Helen Palmer, Clerk, not present as she was at Love Field. (22H 659)
Franklin Kaiser absent from work on 11/22/63. (6H 342 | 23H 751)
Charles Givens does not return after the shooting; an APB was issued for him.
The following were absent that day
Vickie Davis, employee, was absent.
Dottie Lovelady, employee, was absent.
Mrs. Rudell Parsons, employee, was absent.
Joe Bergen, Scott Foreman, was absent.
Maury Brown, McGraw-Hill, was absent.
John Langston, was absent.
https://jfk.boards.net/post/587... got a gun, killed a police officer, and resisted arrest.
All subject to further proof.
At the very least Brennan confirms that a slender, white male fired the shots from the 6th floor window.
Did I mention that 3 other people corroborate: more than one person in the window before the president arrived.
Spanish looking men in light colored clothing - a rifle and a man in a brown suit.