If she was holding a weapon in one hand and the camera in the other it would have to be the gun. If she was simply holding a knife on TA I don't think he would have just sat there and let her take the photo. He would immediately start trying to defend himself. A gun, on the other hand, is a different kind of threat. It might cause someone to become frozen with fear. Personally, I think she had the gun on her person and used it while he wasn't looking, to get the jump on him. Since she went there to kill him there would be no point in warning him in advance. IMO her plan began to go awry when the gunshot did not kill him and, for whatever reason, she was not able to shoot him again. That's when she went to get a knife to finish him off. In addition, I think her original plan was to shoot him in the shower so all the blood would go down the shower drain. She wanted to make sure she didn't get any of his blood on her to accidently take back to CA on her person or in her car. She thought she planned the perfect murder but, think again JA.