Here's how the scenario appears to me based on the autopsy.
Taylor was shot 1st - 1x in the face - then Skyla 4X in the neck and chest (same gun) and then the killer turned back and shot Taylor a second time in the body. Then 1st gun is empty - bring out the 2nd smaller gun - Taylor shot 2 X in the face that gun, she was already gone (1st shots killed her) - the other 4 shots went into Skyla including the neck shot who because she was further away and did not die as fast.
I think most of the abrasions were on the girls already - typical play scrapes, not as a result of the murderes. They didn't have time to get banged or scraped up - it happened too fast - they would have just fallen where they were shot.
I don't think the killer was torturing Skyla - she was just the secondary target and further away - the killer shot her 1st from where he was standing in front of Taylor so he wasn't as accurate - he kinda had to shoot around Taylor at first. He still managed to drop Skyla with the 1st shot - maybe not kill her, but she went down. She was also a smaller target. The last shots on both girls was from point blank to make sure they were dead.
Three face shots and only one body shot on Taylor - there is NOTHING could make it more clear to me that it was one shooter, he was shooting from a standing position (not in a car) and he went to kill Taylor - erase Taylor, destroy Taylor, shut Taylor up, hurt Taylor. 4 shots - one from maybe a foot or two away while Skyla was shot mostly from a distance because she was behind Taylor who was standing facing the killer - maybe 5 feet (at most) away when he started shooting. This killer went to kill Taylor - she was not afraid of him - he either surprised her or she knew him or she was approaching him or talking to him when he shot her. I personally think the overkill was to MAKE SURE Taylor was dead because SHE could ID him. One killer because the shots were heard, fast and furious - not at the same time (as in two shooters) but consecutivly (one shooter) and because two shooters would have meant BOTH girls would have fallen before they had time to step back - Skyla did have time and she was obviously FUTHER from the shooter - meaning one shooter from one position, at least initially. This was one guy and he went ready to shoot multiple people - like maybe he was going to shoot MORE victims in the house but saw the easy target of the girls and went for that. This guy came to KILL PEOPLE.
Skyla's autopsy says she was found supine (face up) - Taylors indicates she was on her back OR her right side. We do not know for sure they actually fell this way - the killer may have turned them over or GPa MIGHT have turned them over when he found them..it would be a natural instinct to do so - to see if they were alive. They hadn't been dead more than 20 minutes when they were found - the blood on the back of their clothing could have gotten there AFTER they were turned face up - they would still be bleeding out. Skyla's head was southwesterly - she was turning to run for safety (The Placker house) when she fell. She did have time to step back and start to turn away - again showing that Taylor was the 1st/main target.
So, I say one shooter and he came to kill somebody inside, at or at or from the Placker house. And he knew Taylor - she was the primary target. Skyla was just the collateral damage - she was killed becuase she was WITH Taylor when the killer found her. It seems this killer was prepared to kill everyone he encountered - only two girls so he emptied 2 guns into them - and took the time to step in close to make sure they were dead before he left. He would have been blood spattered too, if the POI was seen AFTER the shots were heard, he didn't kill the girls, because he wasn't bloody. Whoever did this definitely got Taylor's blood on him and MAYBE her blood on the outside of the vehicle (if there was one) depending on how close it was parked to Taylor.
Wonder who came home and burned a shirt and pants that day, or disposed of a set of clothing and a pair of shoes ??? If the killer left in a car - there would be blood inside it too, mostly Taylors but traces of Skyla's blood too. This guy got CLOSE to both girls and may even have touched their bodies - OH PLEASE LET THERE BE DNA!!! Please let this killer be chased down and eliminated (because he was shooting at the cops) like a rabid dog, I don't even want to waste the time or money on a DP trial - we all know he will end up on death row - no need to wait.
And after all we know about Taylor's family it does NOT surprise me she had a tattoo, it may even have been a crude "jail-house" home-made tattoo - self-done - did anyone else notice the heart was upside down from a viewers perspective? Like maybe Taylor did it on herself?
My Opinion