I wonder, with her love of animals, if Taylor didn't hear something in the woods (or beyond), thought it was an animal in distress and go investigate. Thus the two stumbling upon whatever.
I don't see that happening. If, like others have suggested the shooters were executing someone, where's the body? If they took that body, why not the girls? I have to think it was a thrill-killing or the girls were targeted.
The cell phone. Where was it? Dropped by the bodies? If so, why was it not in a pocket, but, it seems, in one of the girl's hand? If it was in her hand and if they were going to answer the grandfather's call to come back, wouldn't that narrow the time down even more?
It was probably on the ground or clipped on her belt. If the girls were involved in a luring or attempted abduction, the phone may have been out to call for help, possibly triggering the murders.
What was said on the 911 call?
I think it would be disturbing, but not helpful. LE does not seem to suspect the family, so
Who else did the grandfather call and in what order? Who called who and when did everyone get to the scene? EMTS? Parents? Police? Would the police have come with the EMTS or later (did the grandfather say they were shot or did the authorities think it might have been an accident (car hitting them)
Not sure where you're going with this one. It sounds like you're questioning the family involvement. Given the intensity of the investigation and the international scrutiny, I would like to think that any family issues would have been brought to light by now.
Remember LE investigates family first, then moves out to friends, acquaintences, then strangers. If the family hasn't been linked by now I'd have to think they were not involved.
Who placed the cover over the girls and wouldn't it have contaminated any evidence on the bodies?
If it were the emt's then it was probably cleaned and/or sterile. Contamination would be minimal.
If the EMTS treated the girls (and why, if they were so obviously dead) wouldn't that have also screwed up any evidence? They must have touched the bodies in more than just a check to see if they were dead if there was gauze on one of the wounds.
Dead doesn't always look dead, if you know what I mean. Especially in this day and age, modern medicine can work miracles. The EMT's probably checked vitals thoroughly.
Not to disturb anyone, but: death is not always instantaneous, even with headwounds and gunshots. Wounds will still bleed, the body might twitch, it may even take a few minutes to stop breathing. It all depends on the time between the attack/injury and the emt's arrival.
If there are shell casings, the grandfather hasn't (to my knowledge) said he saw them. Now, he might have missed them in his distress, but, if not, I wonder what else he might have saw that he hasn't said publicly.
The shell casings should not have been "piled up". Shells that are kicked out of a weapon fly randomly. Some go up and back, some go up and out to the side. If you fire a ten-round magazine, there are going to be shells in ten different places. If the casings were in a pile, someone put them there. They are also difficult to find in weeds/grass.
And as far as the grandfather goes, I doubt he saw anything once he saw the bodies. God help him.