WARNING: SPOILERS AHEAD. Do NOT continue reading if you have not watched episode 3 of “The Walking Dead.”

Episode 2 of “The Walking Dead” ended with a pretty serious jaw-dropper – the death of two prison inmates. While deaths are not uncommon on the AMC series, what made these deaths so shocking is that they didn’t occur at the hands of a walker. Instead the victims were killed by a mysterious person living with them in the cellblocks.

The people murdered in episode 2, “Infected,” were Karen and David, newcomers to the prison who had the misfortune of coming down with a nasty cough. Due to an illness that Patrick had (which resulted in his death and rise as a walker), the Prison Council decided to quarantine the potentially ill residents. But someone decided to take matters into their own hands.

When Tyreese went to go check on his girlfriend, Karen, he discovered a gruesome sight. Karen’s cell was spattered with blood and had a trail of blood leading out into the courtyard. The trail lead Tyreese straight to two bodies … two bodies that were so badly burned that the only way he was able to recognize Karen was by some metal jewelry she had on.

The episode ended with no clue to who might have decided to play God with their fellow survivors, but according to SpoilerTV we’ll get an answer by the end of episode 3, “Isolation.”

“I’m not going to tell you who killed Karen and David (even though I know), but I will say that you will get a strong hint of it by the middle of this week’s episode on AMC,” their source Henry Spivey reported. “And it’s confirmed by the very end of the episode this week who did it.”

Who could it be?

Our theory is that the murderer is one of the core members of the group and possibly part of the Prison Council. Fans will remember that Hershel, Carol, Daryl and Glenn decided that it would be best to keep everyone who could have been infected away from those that were not in C Block. Rick even told Carl that the two of them would have to stay away from baby Judith until they could be sure not to get her ill.

It’s easy to assume that Karen and David were murdered to protect someone’s family from the “new threat.” Could Carl be channeling his inner killer? Would Glenn do anything to protect Maggie? Or has Carol gone off the deep end?

“You find out who did this and you bring them to me,” a very angry Tyreese tells Rick in a promo video for episode 3. “You understand?”

You can watch episode 3, “Isolation,” when it airs on AMC on Sunday at 9 p.m. Let us know your thoughts on who could have possibly murdered Karen and David on “The Walking Dead.”