The second season of "Who Killed Sara?" is a wild ride that ends with the realization that Marifer, one of Sara's best friends and Álex's confidante, may have been responsible for Sara's death. Much like Álex, Marifer is fueled by her need for revenge on the Lazcanos since she believes that they're the ones who killed her mother. To enact her revenge, she gets her sister Clara to become Chema's surrogate in the hopes of extorting information from Mariana.
All of Marifer's plans begin to unravel when Álex and Nicandro discover a hidden tape labeled "Abel" in Sara's room. The tape reveals that not only is Sara actually Álex and Marifer's half-sister, Marifer's father Abel is the one who killed her mother. As she leaves Álex's house, Marifer flashes back to the day Sara died and we see her frantically cutting the parachute's harness. So, did Marifer kill Sara? Everyone believes she did, including herself, but the final scene of "Who Killed Sara?" shifts the blame to someone else entirely.
