@Blueflame Then there has to be something in between where he is now and his final form. Because there the two agents that are currently after shadow can contain him.
@katherinwinter I feel really dumb right now, there was a couple things in my post I'm pretty sure I needed you to respond to, and I managed to completely overlook it for several days. That being an agency truck arriving to collect the car and if any of the memories he collected from the scene (in particular from the car's driver) had important information.
@Phantomlink959 I wasn't sure if you needed anything from me. I thought about posting the car being taken to a shop but that wouldn't progress the story. As for information I am not sure what you need. There wouldn't be a lot. Maybe a description of Mason before and after the change. Description of what happened. The actions of the agents before him. All that is in previous posts.
@katherinWinter for the time being I suppose I'll just have him head back to HQ and get the residue samples to the lab for analysis. Assuming BOSA has a lab outfitted for working with supernatural materials and residue.
@Phantomlink959Either that or he can go met the team. Most of them are just standing outside the sewer. The BOSA has everything the MIB has and lots of supernatural gadgets.
@LightningMaiden@KatherinWinter Cas very well could trap shadow as long as he doesn't attack him cause any attack that is remotely holy will make him go insane normal attacks might take a few. A pentagram would trap him although not for very long but a demon or holy parchment seal will trap him
@KatherinWinter Not really, Isn't one character chasing him holy inclined
Nope. Just holy water. Which might stun him but wont stop him. There is no time to make a demon trap and none of them have holy parchment. Even if roger was with the two after Shadow he wouldn't be able to hold the final form long enough to get Shadow to the bureau.