Why does it have to be anything going on prior to that lengthy meeting? If LT had planned to commit suicide, then he had the foresight to know someone else would have to lead the Explorers program.
The lengthy meeting 18 hours or so prior to being shot with his own gun at close range with forensic experts not being able to rule out the possibility his hands were on his service weapon when it was fired. He knew he wasn't going to be around to continue with the Explorers group.
I do think that he still cared about it. It was his "baby". JMO