This was left behind when the cops took you away.
3 seconds sound clip from Darkwing Duck - Darkly Dawns the Duck: Part 2 (S01E01).
You can hear this line at 00:13:51.814 in the DVD version of the TV Series.
Quote context
[...]
- My life is filled with nothing but case files and chemistry sets.
- Gosalyn is gone, and I don't even have a friend to ask for help.
- Oh, that's reverse. I thought it was park.
- Launchpad? Launchpad! What are you doin' here?
- This was left behind when the cops took you away.
- I was comin' to bail you out. Guess there's no point to that now.
- Don't worry about it. Heroes don't stop for paperwork.
- And maybe this costumed clown can still be a hero.
- By now, Taurus Bulba must have Gosalyn in his airship. We have to find a way of getting up to him.
[...]