Arrow Season 3 Spoilers: Possible Identity of Sara's Killer

Much of Season 3 of Arrow thus far has focused on the death of Sara Lance, aka The Canary, in the premiere episode. An unknown assailant fired three arrows into her chest, and she fell off the roof to her death. Now that the midseason finale is approaching, let's take a look at the evidence and revise our earlier predictions.

Let's look at the facts thus far:

- Sara knew her killer because she asked what he or she was doing on the roof.

- The killer used a voice modulator, or is Barry White.

- Felicity said the killer threw the arrows rather than fire them from a bow, but this conflicts with the sound of a pulling string we heard in the original scene.

- The killer was a shorter person.

So let's look at our original predictions and rule out some possibilities.

Ra's Al Ghul:  Ra's is the main villain for Season 3, so it would be almost too obvious if he were the one to have killed one of his League of Assassins members. But it would be a logical way to introduce Matt Nable's character and would immediately give Oliver a reason to want to bring him to justice. Ra's would likely be upset that Sara deserted the League in the first place, and if he wants to take out Oliver or attack Starling City, then this would be the way to start. Sara also looked shocked that her attacker was even there, and she would more than likely be stunned to see Ra's in Starling City.

Updated Prediction: Still a possibility, though it seems less likely than it used to given the new information. Oliver ruled him out because the League of Assassins doesn't kill its own.

Malcolm Merlyn: The Dark Archer has taken his daughter and Oliver's sister, Thea (Willa Holland), under his wing, but his motivations remain unclear. He likely wants revenge on Oliver for the events of Season 1, and what better way to take it than to kill his former love and close ally? Sara did die from arrow shots, after all.

Updated Prediction: Malcolm claims he didn't do it and gives a damn good reason why: If he did, the entire League of Assassins would come after him, and he's trying to stay as far away from them as possible.

Nyssa Al Ghul: This one is less likely because Nyssa and Sara were lovers at one point, but it would certainly make for an interesting twist. Perhaps Ra's demanded that his daughter prove herself after she let Sara go in Season 2. Or maybe she was brainwashed into doing it.

Updated Prediction: She seems deadest on finding the killer, and she was always just a wild guess in the first place, but we'll go ahead and rule her out.

So who are some new possible candidates? Roy looked like the killer for a minute, but the episode "Guilty" pretty much ruled him out altogether. Sin is scheduled to return early in 2015, and she will reportedly play a pivotal role in the entire mystery. Could she be the killer? Finally, Thea has become a prime suspect amongst many fans, but that, too, seems like a stretch.

Whom do you think killed Sara? Let us know your theories in the comments section.