How to uninvite guest

How do you uninvite a guest from a wedding? FH’s blood-related aunt (we’ll call her Cathy) recently passed away from her battle with cancer. Both she and her husband (we’ll call him Tim) we’re invited to attend the wedding. While we personally never wanted to invite Tim, we did out of respect for Aunt Cathy. Anyway, now that Aunt Cathy has passed away, we want to uninvite Tim but we’re not sure how. What spurred this sudden idea to uninvite him was due to the fact that he was disrespectful to everyone (especially FH’s family) while Aunt Cathy was battling cancer. He did nothing to help or support her. It was friends and family that cared for her, bringing her to her chemo appointments, and caring for her in her last few days. Tim lacked any empathy or sympathy for Aunt Cathy or anyone else. He has made rude remarks to my FH’s family e.g., offering to give Aunt Cathy’s used supplies to my FFIL because “he’ll be the one to need it next.” On the day of his Aunt Cathy’s passing, Tim had the audacity to tell us he can attend the wedding because Aunt Cathy has now passed. I was shocked and speechless. There may be legal battles over Aunt Cathy’s will and we just don’t want him there dampening our special day. Any advice would be helpful.