O'Tabby had to have left directly from the campus to call on Maudie O'Purr that night because he was still drinking from his favorite mug when the crash occurred.
8 seconds sound clip from the Garfield's Babes and Bullets (1989) movie soundboard.
You can hear this line at 00:21:54.000 in the Blu-ray version of the movie.
Quote context
[...]
- She called after you'd left. I told her you were going to nab the murderer. She came right over.
- I didn't answer. My thoughts were still in the arms of a classy babe.
- There had better be a check in that envelope.
- Sam, how did you know O'Felix killed Professor O'Tabby?
- Professor O'Felix, the substitute girl Friday fixed that cup of coffee.
- Like clockwork, the pills took effect and O'Tabby drove off the road to his death.
- It was the old power struggle in the university routine, Kitty.
[...]