Who killed Isabel in Furious? For over a decade she was just a Jane Doe in an FBI drawer

Every good revenge thriller runs on one unanswered question, and in Hulu's Furious, that question has a name: Isabel Luna. Catherine (Lola Petticrew) has been fentanyl-ing her way through New York's worst rich men for one reason — somebody killed her best friend in 2012, and the world responded with a shrug so loud it echoed for fourteen years.

What we know about Isabel

Piecing together six episodes of flashbacks and increasingly unhinged interrogations:

• Isabel and Catherine grew up together in the Bright Fields group home, where Isabel was the protector and Catherine was the kid everyone bullied;
• Both girls were trafficked to wealthy older men in billionaire Jay Easton's orbit;
• In 2012, Isabel turned up dead with her face destroyed — a Jane Doe nobody bothered to identify;
• The FBI had the case. Nora worked it. Her boss Ed made her close it, because Ed was quietly moonlighting as Easton's fixer;
• Oh, and Isabel had a baby. Her bracelet traces back to a safe surrender box, and the girl, Elaina, is very much alive.

And the killer is...?

Here's the twist the show keeps rotating in front of us like a rotisserie chicken: even Easton's own lawyer, Hal, insisted with a syringe hovering over his eyeball that Easton didn't do it. A man in that position has no reason to lie and every reason to be flattering. Catherine herself can't remember the night — she went to Easton's house, and then Isabel was dead. That gap is the whole show.

Meanwhile the one FBI agent actually clawing at the truth, Alice (Emmy Rossum), keeps getting kneecapped by her abuser-slash-colleague Marshall.

"He's costing her her job. He's costing her her sanity," Rossum told Gold Derby about the man standing between Alice and the case.

The finale lands August 31. Until then, Isabel's file stays open — for the first time in fourteen years, which is its own kind of justice.