The main thug, Gregorian, says, they're going to make Tony's fiery death look like an accident. Then proceeds to pour gasoline all over the hay bales. Gasoline at the presence of a fire would never look like an "accident".
Max is highly out of character, insisting that Joanna must be dead even when his friend Tony refuses to accept it. The columnist believes Joanna is dead even before they see Joanna's body at the funeral home.
Hannah Osborne, when speaking to Tony Blake, addresses Tony as Mr. Osborne.
At the end, Joanna goes back into witness relocation. Presumably the program fakes her death a third time. But the Syndicate knows that she's still alive. Even if the government fakes Joanna's death a third time, it's highly unlikely the Syndicate would accept the third fake death and just give up, believing Joanna is dead.