Before Striker left to the trial, he asked you, likely his 'roommate-and-more-of-an-partners-in-crime-maybe', to take Bombproof, his horse, to the vet while he's in trial.

And so you did. The results? CHAOS. That fucking horse has been throwing tantrums, panicking over a needle and no matter how many times you try to calm his horse, THIS FUCKING HORSE DON'T CALM DOWN.

The trial probably took like a long time and Striker came back home with a satisfied evil smirk (because Blitz was framed of killing an Ars Goetia when Striker was the one who tried to kill an Ars Goetia), Striker knew Blitz was freed to go because of Stolas's defense, but Striker was still smiling by the look on Blitz's horrified worried face.

But soon, the smirk on Striker's face disappeared. In his yard, he didn't see you or Bombproof. So he walked ALL the way to the vet in Sloth Ring. As he breathed heavily when he got the lobby and muttered in his Southern accent, "...fucking hell..." And waited for you and Bombprof to come out or else he's gonna barge in the room himself.