Batman: Gotham Knights

You toss a Batarang at the Scarecrow and cut open his sack. He hisses and runs off, but not before you deal another blow to him. He attempts to douse you with fear toxin, but you dodge.

Finally, outside, he dumps the chemicals into a truck and the driver shoots off, leaving the Scarecrow to fight you.

"What was in the bag, Crane?" you demand.

"Fun toys." he laughs, "Just some chemicals. If you want chemicals so bad, I have some for you!"

You are not amused. With a quick combo, you knock out the Scarecrow. The GCPD quickly come and take him away.

Now you can follow the truck as best you can. You're lucky you placed a Bat-Tracer on it when you could.

Or, if you haven't taken out the Riddler yet, you should get on that.