<P> The season ends with Tara's arrest for conspiracy to commit Pamela Toric's murder . </P> <P> After a season of failed attempts to get herself and her sons out of Charming (including a false pregnancy and subsequently faked miscarriage to bar Gemma Teller - Morrow from gaining custody of Abel and Thomas, should Tara go to prison), and after Tara and Jax's relationship was tested (Tara and Jax are having problems with her being behind bars for her involvement in the death of a nurse . Jax is seen at the end of episode 1 cheating on Tara with Colette Jane, an escort handler) Tara finds herself at odds with everyone she was supposed to be able to trust and chooses to use the bullet she pulled from Bobby Munson's shoulder as evidence necessary to grant her witness protection, in turn making her a rat and a liability to the MC and to Jax himself . In a last - minute plot twist, Jax finds Tara at a park in Lodi . They talk for several minutes and then the scene cuts to the motel room Tara had been hiding in . The two come to an understanding and Jax surrenders himself to the mercy of DA Tyne Patterson in exchange for Tara's immunity for all the crimes she committed on behalf the MC, specifically that of the murder of Pamela Toric, for which she was accused in season 5 but did not have anything to do with . The DA agrees to what Jax offers her after a few moments of reluctance to believe that he will come through . With that, Jax has let Tara know that he truly loves her and their sons more than anything . They cry and make love . Tara and Jax agree to meet the DA at the Teller home at 6pm after he spends his last hours as a free man with his sons . He tells Chibs and Bobby he will most likely be sentenced to 25 years, with parole in 10, 7 if he's lucky . Tara gets home earlier than expected and the house is empty, save for Eli, the sheriff, who entered the house with her so they could talk in private and he could help her bring her suitcases into the house, as she decided not to run away and do what Jax asked of her; raise their sons . </P> <P> When Eli leaves, stating he'll be outside, Tara calls for Wayne, assuming his truck outside meant he was in the house . Caught off guard, Gemma comes out of the laundry room and lunges for Tara, who cannot escape in time . Gemma hits her with an iron but doesn't knock her out . Tara struggles against Gemma's beating and her head is badly smashed on the sink, where Gemma then attempts to drown her . In one of the show's most gruesome moments, Tara struggles for several seconds before Gemma grabs a barbecue fork and stabs Tara multiple times in the back of the head and her neck . Blood gushing out of the back of her head, Tara collapses and dies . </P> <P> Lt. Roosevelt walks in on the scene and discovers Gemma sitting on the floor next to Tara's body, in obvious shock . Gemma is mumbling incoherently about how it had to be done because she was going to rat out the MC . Roosevelt tells her she didn't rat out the MC, and that Jax is giving himself up to protect her . Immediately after this, Juice walks in, sees the scene, shoots Lt. Roosevelt twice in the back and then comforts Gemma . After this he begins cleaning up the murder scene . Jax returns home later that evening . He sees Lt. Roosevelt's legs on the kitchen floor, draws his gun, and then enters the kitchen, where he finds both Eli and Tara dead on the floor . Stunned, he drops his gun at Eli's feet and cradles Tara in his arms . </P>

Who killed tara in sons of anarchy season 6