Can't Supergirl call a press conference? Or just barge in on someone elses spotlight, like Superman did in movie 4, when he told the UN that he was getting rid of nuclear weapons.
Doesn't the DEO have the same list as Cadmus?
Text the Aliens.
Oh.
Supergirl makes a Vine Video about how murders are coming to murder thousands of aliens across... Surely the Fortress can take over all world wide media for 5 minutes?
Doesn't Lena own some media outlets?
"Your Mommy is going to kill a lot of people, help me stop them."
Here's a serious question...
Why the #### isn't Kara Danvers on that list?
Another serious question.
Why didn't they turn the alien bar into a trap on the off chance?
The most serious questions.
"Why are you afraid Jerry, that men in masks are threatening to shoot your bullet proof daughter?"