And boozing it up at work.
It looked to me like it was dark outside the windows, so that was probably after work hours.
Can't say I feel too sorry for Max and whether he gets his Miranda rights or not.
But we can't pick and choose whose rights we respect. Rights have to be universal. Just last week, Alex was saying to J'onn that they don't get to choose who they save, that they have a duty to protect even a bigoted fanatic like Senator Crane. Surely the same goes for whose rights they have a duty to honor. It's not about Max as an individual, it's about whether Alex is a hero or a hypocrite. Not to mention how bad it looks for Supergirl to be okay with such a violation of civil liberties.
(But then, this show is from the same producers that had the Flash lock people up in the STAR Labs particle accelerator with no legal authority or due process. So this is a recurring problem for them.)