I had a revelation earlier today and maybe someone else has already posted this same idea....this kinda piggy backs on what people are saying right now about JA trying to get Travis to change his mind about Cancun and for that matter, the future of their relationship. This will also answer the question of why Jodi had a gun and a knife....it will also convince those who think there was no sex that there was sex (ok they are stubborn folks so probably not).
Jodi brought the rope. And she brought the knife to cut it. I think Travis was expecting her and the way she got back into his good graces was the way she always did, by using sex. Tying Jodi up was a fantasy of his that didn't work previously because they used twine. I can't picture Travis buying "soft" rope for Jodi and keeping it at his house just in case. No, I think Jodi bought it...maybe on the way, maybe in Yreka. Doesn't matter. So she promised Travis he could live out that fantasy with her.
I know. A lot of people here don't think there was ever a rope and I used to think that, too. But now I think there was a rope and I think there was a knife to cut it. Both provided by her.
Where does the gun come in then? This was her last desperate attempt to change his mind. If he didn't she was going to threaten suicide...something I think she probably had done before when she didn't get her way. So she stole grandpa's gun to take to AZ and show Travis she was serious. Think Betty Broderick and Jean Harris.
During the shower pics, Travis said something to seal the deal that the relationship was over. Now she's enraged. I think she got up from her crouched position accidentally taking the pic of Travis sitting (no head) as she was getting up. She Went into the other room still carrying the camera, got the gun and came back holding it to her head. Now she's all Betty Broderick crazy. She drops the camera (ceiling pic). Travis tackles her just like she said and she dropped the gun just like she said BUT SHE DIDN'T SHOOT HIM. He tackles her to save her, not because she dropped his d*** camera. They tumble to the floor. The camera gets kicked across the bathroom and into the hall during the struggle.
The knife is right there on the edge of the sink, so she reaches up and she in full rage now. she stabs him in the chest and abdomen while Travis is still on the floor. Blood splatters on the baseboard and toilet from Travis' hands as he tries to block the knife. Travis manages to get up and supports himself while leaning over the sink, dazed and coughing up blood. Jodi's stabbing him in the back, neck and head, and he falls to the floor. He's on all fours and won't die. Travis crawls down the hall where he collapses and Jodi cuts his throat. She then drags him back down the hall. All in 62 seconds. There's no running around or body slam.
Jodi's exhausted/exhilarated. Travis is on the floor. She finds the gun and contemplates shooting herself but she can't do it. She now realizes that she has to clean up and get out. But first she stages the scene. She shoots Travis in the head making it look like there were two intruders. 2 weapons, 2 intruders. She stuffs him in the shower and rinses off
Now, I know there are problems with this theory, but for me, it satisfies some major problems I've had with what happened in that bathroom.