Well, yes, all supposition. But we can try to account for all the facts.
The last ep showed us a case we hadn’t seen before: a person asked for help, but that didn’t trigger Tru’s power. Why would this be? That is, was she supposed to die or not?
It seems to me that we learned from “The Longest Day” that if she messes up and causes another death that wasn’t to be, she goes back again. I think we can take this as a given, then, that she will always relive the day until she get’s it right, whatever fate “right” is (though this, to my knowledge, hasn’t actually been demonstrated), even if she re-causes the same death.
So why didn’t Tru go back when the young college woman asked for help? To be sure, she was supposed to die. But not in the way it happened, which is to say, the man wasn’t supposed to kill her (leading to his own suicide). It is hard to believe a benevolent fate wanted her to commit suicide, though.
Assuming Jack caused the young woman’s death, then, we’re left with two options. One is that fate is not benevolent, it just is what it is, and that can be malevolent at times. The other is that Jack himself is not benevolent, and would have killed this girl one way or another. But if that wasn’t aligned with fate, her death in this episode by suicide would have triggered another flashback re: The Longest Day.
So I think it is safe to say, she was supposed to die re: fates, and Jack was the man to get it done. Perhaps he’s even like Tru’s mirror image (see the symbolism in this show, and Davis’s talk), not good, but there to make sure that when people are supposed to die (if that is not already part of Tru’s machinations) then they will, by hook or by crook. In any case, he is an agent of fate just as Tru is, only responsible for fated death, not fated life.