Mafia 43. Struggle for Omega

Justiciar Samara.
Investigation 1: Determines if the player killed someone. Yields a positive result if the killing was unsuccessful.
Judging by the order of the investigations, in the first turn, Samara will receive a negative answer in all cases, except when the same bomb is planted?

Added 6 minutes later
Manual Warren.
Investigation 1: Redirects the vote. If the Warren or the target of his investigation were killed, the redirection is considered successful. If the player, to whom the Warren was redirecting the vote, was killed, then the target of the Warren's investigation has zero votes.
Can you redirect a player's vote against himself? For example, "Investigation 1. Redirect the vote of a red-haired player against a red-haired player."

Added 4 minutes later
Morinth.
Ability 3: With a 50% chance, kills one of the attackers at random (in this case, the attacker's investigation does not trigger), but she loses her turn. Clues for such killings are given in the same way as for ordinary killings.
So, if two attackers come, will they still kill her?
And if so, which of the attackers will have a 50% chance of dying?

That's all for now. Thank you for the previous answers.