Where was Jason Todd in Arkham Asylum?

Let's take a quick dive into Jason Todd's life.
My first video is probably going to hit 1,000,000 views,
and I made it four years ago on MICROSOFT WINDOWS MOVIE MAKER!!
So I thought I should remake it, and add the comic story line in there since I suppose it's canon, right? I got some future videos to make such as Tahlia Al Ghul still being alive in Arkham Knight, as well as a probable Wonder City video later this year! :)