(In as much as I don't know if it could be determined after the damage to the camera whether or not Jodi Arias reset the time (or time zone) as a part of staging the scene, I'll predicate my presumptions on the time stamps being accurate - does that sound like a JA-inspired sentence?) What doesn't make sense about time in general I'll get to afterward, but something there is still fishy. After playing it out in my head and referring to testimony, reports and pictures many, many times, and reading all of the opinions from everyone here and finding I missed or misunderstood something important and going back and reworking it, finally this scenario makes the most sense to me.
I believe she went there to shoot him with the gun (to stop him from exposing her) and then stab him in the heart (to pay back the stabbing she feels she received from the last conversations they had and his intent to expose and destroy her). All the rest of the violence I believe is because she presumed he would be dead or nearly so from the gunshot when she planted the knife into his heart. She may have tried to use the gun again and it jammed or he knocked it out of her hand, leaving her with only the knife to stop his increasing noise and to make sure he died. But it getting messy, or having to cut his throat I don't believe was in the original plan.
6-4-08:
3:00 - 4:00 a.m.: JA arrives at TA's house, she parks nearby in a location where the either upside-down or missing back license plate won't be too noticable (backs up close to another vehicle?) and waits for roommates to leave. Zack has a rental car to return this morning and does so after waking but that time is not mentioned in Det. Flores report. Flores mentions Enrique usually leaves the house at approx. 6:00 a.m.).
6:00 - 8 a.m.: Enrique and Zack leave house.
8:00 a.m. - 12:13 p.m.: TA puts floor cleaner together and moves furniture off tile, receives text from Chris Hughes about evening conference call and texts back. TA then goes upstairs for a nap.
12:15 - 2:00 p.m. JA enters home with purse containing gun and knife, duct taped together to conceal and prevent clanging together, finds TA alseep, places purse on end of bed, gets KY from purse and places it on bed, undresses and by hand or using timer she takes 6 pics of herself and then begins taking pictures of Travis. He wakes up - pic 1:47:15 (TA could not have taken the 1:44:00 pic of JA because 50 seconds later he is lying in bed apparently asleep and all of the time-stramped pics of her are before the pics of him). She makes the excuse she came to bring him the church trip CDs and the check for 2 months of car payments (and anything she may have planned to blackmail him with that caused his very angry texts). She wants to part as friendly as possible, etc., etc. and really only wanted a couple pics to remember him by. He knows her wild side so maybe doesn't find it altogether that strange (for her).
2:00 - 3:00: TA and JA go down to his office to put the check and CDs away, she leaves, TA locks front door and goes back upstairs to finish his nap before showering and the conference call.
3:00 - 4:00 p.m. Zack comes home and leaves again, TA sleeping.
4:00 - 5:20: JA enters the house again and hides in Travis' closet, placing purse near luggage at the closet's bathroom entrance and untapes weapons. TA wakes approx. 5:00, JA surprises him but since he has already seen her once that day unexpectedly, he is not all that surprised (this may be typical of her behavior, I don't know) but he is not frightened. He allows her to take what she probably tells him will be the last pictures she will ever be able to take of him. Photos begin at 5:22:24. At 5:22:36 (second photo) horizontal bed sheet lines can be seen on TA's lower back, showing he had slept recently before photos began.
5:25:00 - 5:26:56: There is a photo here (evidence item #152) we didn't see in court and do not know the time stamp on it, but this is the longest duration between pics so far (1 min., 56 sec., not including whenever #152 was taken), JA is likely readying her weapons while talking TA into sitting position in the shower.
5:27:18: TA turns to sit down, bumping camera, next pic (5:27:28) looks accidental, 1 minute, 26 seconds later another seemingly accidental pic is taken (5:28:54), while he is positioning himself to sit, JA has gun close at hand.
5:29:12: Face picture, dark and TA looking downward.
5:29:20: Face picture is taken, TA looking at straight at JA.
5:29:21 - 5:30:29: (Slightly over a minute since last photo taken) TA is still in sitting position from face picture, JA has gun in hand.
5:30:30: JA stands and shoots Travis above right brow, picture is nearly simutaneously taken as JA's right hand flexes while shooting the gun with her left hand. First drop of Travis' blood is seen in lower left corner of sitting picture, at corner of shower stall and door edge. JA mentions the 'loud ringing sound' in her first telling of the ninja story, I think a gun fired into a shower stall in a bathroom that has tile floors may sound like that.
I think it is also pertinent to mention that until the last (sitting) picture, Jodi Arias has only taken pictures of areas of Travis's body that she will soon inflict the gun and knife wounds upon, that may be coincidental, or not
5:30:31 - 5:31:13: Travis, gunshot wounded and maybe not realizing what happened, tells her to 'go get help, go to neighbors' as he exits shower while JA drops the gun and grabs the knife around the corner, he falls to hands and knees outside shower as she begins inflicting back, neck and back of head wounds, he attempts to get up and she pushes him against the wall behind shower door (leaving a metal mark on inside of shower door edge with knife (marker 4), he pushes her off of him, knocking her near the camera, which she picks up, causing picture 5:31:14 to be taken.
5:31:15 - 5:32:15: As TA moves towards sink looking for a towel or something to stop the bleeding he pushes JA away, she drops the camera and it slides part way down the hallway, landing upside down. She begins stabbing at him again, he coughs blood on mirror and sink, turns right to ward off more knife blows, receives heart and other chest, neck and stomach wounds (her back is to the scales and blood from knife is casting backwards, some landing in wastebasket). He gets away from her and heads down hallway trying to get to the bedroom door and out of house, she follows and inflicts deepest center back wounds, turns him around near outlet/light switch, she pushes him to the floor and then over, landing on the bedroom carpet. She pins him and slices his throat, and he finally he stops struggling. She drags him by his arms down the hallway, stops and gets the duvet cover, as she's rolling him onto the cover she bumps camera and it takes pic 5:32:16.
5:32:17 - 5:33:32: She finishes getting him on the cover, goes and gets the gun and knife and puts them back in her purse (hopefully she has a baggie), probably stops to catch her breath and examine the cuts on her hands (two on left, at least one on right as Ryan B. said she had 'bandages on her hands' when he saw her). She begins to pull TA the rest of the way down the hall, reaches over to pick up the camera and takes pic 5:33:32.
5:33:33 - 6:14 p.m.: She deletes pics from camera and gets the plastic cup from the sink cabinet and fills with water from the running shower to spread water down the hallway and uses a towel to wipe up her footprints. She undresses and takes a quick shower then uses the duvet cover to help her pull TA into the shower, then rinses herself again and gets out, removes duvet cover from his body. She gets the sheet from bed and puts all bloody items into it, along with all pillow cases (she likely rolled her wet, bloody clothing up in the shower mat and that caused the 'kool aid' stains on the car seats). She dresses in closet, steps back in bathroom looking for camera (which is in the duvet/sheet bundle) and leaves shoe print, does not see camera, wipes her shoes and takes bedding down to washer (leaving watery bloody stain on bedroom door from laundry, marker 9), does first load (duvet cover and sheets, etc). She washes up in bathroom near office, cleans off stair banister, checks TA's phone messages and after putting bedding into dryer starts second load with camera, and then she finally leaves TA's residence.
Time issues: If Zack is right and he was at home between 3:00 and 4:00, and Travis' last use of his laptop was around 3:45 p.m., seems like Zack would have had to have seen or heard him. And since his phone was also found in his office, if he had been on the laptop around 3:45, why didn't he check his phone for messages? Flores report says messages/calls came in but they had not been returned. Also, it appears she had to have washed a load of clothes, put them in the dryer and then put the sheets, camera, etc. into the washer, added bleach and whatever else and turned that on before leaving, I'm having a hard time fitting this in with the time stamps of the shower/aftermath photos, if Enrique came home between 6:00 and 6:15 as he stated, they had to have missed each other by bare minutes for her to have enough time to complete one washer cycle and then start another. Enrique also said he saw Travis the morning of the sheduled conference call and Travis said he was tired and had only slept 15 min. the night before, but Enrique originally thought that had happened on Thursday morning so I didn't include that in the timeline above as I'm not sure when he and Travis last spoke.
Sorry for being so long winded. Such a pity JM will probably blow it to smithereens within the first 5 minutes of rebuttal. lol Your comments and critiques completely welcome, I'm sure I've still missed much.