For all the sins of TMK, we have no clue whether he had a deathbed conversion or not.
Our Lord welcomes the worst sinner who repents.
I can’t tell you if he repented or not, but I would rather err on the side of forgiveness.
Lord knows, I’m a sinner too.
“I say to you, that even so there shall be joy in heaven upon one sinner that doth penance, more than upon ninety-nine just who need not penance.” Luke 15:7