Lily examined the victims and ordered someone to take some blood samples from each of the injured men and examine it. While that happened, she had a look at the wounds. Sirens were peculiar beings, this was new information. She still didn't want to investigate that boy, but his mother would be an interesting test subject. If the agency wouldn't fail her again. 
"I have no cure for them at the moment, just keep them on IVs and check their blood regularly," she told the runner. "Continue testing their cognitive skills."
If they died... well, they were replaceable. This would give result either way and that was good for research.

Agents closed in on Freya and one of them fired a tranquillizer at her, so they could capture her alive and be safe while doing so. One of the agents documented with verbal commentary in addition to his body cam, as per instructions. This was a test subject that was deemed valuable, so they had to be careful with her.
Once subdued, they'd take her to the research facility.

As Freya was being assaulted, Mike send an email to Stuart while Benjamin searched the intranet for information on Steph and the others, or the research facility they were brought to. It wasn't long before he realised he didn't have the proper clearance for most of it. 
All he learned was that the research facility existed and some of the names of the people who worked there. And one disturbing picture of a lead scientist who smiled next to the body of a female vampire strapped down to a research table.