If you are right,
Moo… then the killer had to text the person driving that they were done and ready to be picked up. For the case this would be wonderful. Phone would have had to ping off of a tower and it would provide irrefutable evidence they were at the house.
If they texted the driver… their cell phones Could also possibly have been picked up/pinged by the girls home wifi devices/internet hub. (For example when you look for WiFi and all your neighbors pop up and or when at airport and everyone standing near you with a hot spots name pops up or when you put your Bluetooth headphones on and other people near you devices pop up to connect to yours)… our devices store this information.
Our digital footprints are everywhere.
All of which had to be at the top of the list of tech/digital evidence the police went through and requested in the first few days.
A great deal of which the digital forensics teams could acquire very quickly but without going about it the right way, which is to get official search warrants for those towers and devices… they would not be able to officially use in court.
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Which to me… MOO… means LE has a POI and has had a POI for a while… some of these digital pieces of evidence require official search warrants to obtain to be able to be used in a trial for conviction. These can take several days or weeks to acquire. Depending on what they are requesting.
The evidence itself can be discovered quickly, point LE in the right direction and allow them to begin building case, collect more evidence in the meantime… in some cases for certain crimes etc, you can do some things without the warrant.. but its still a touchy legal loophole so in a case at this magnitude… I’d imagine… before releasing any info on confirming what digital / tech evidence they have…. They will more than likely want to have the paperwork to back it up in court so that it cannot be thrown out.
I’m hopeful the killer left some sort of digital footprint behind… whether from text to getaway driver (me personally I believe whoever did this acted alone) or by their own device they may have had with them. (Which I’m doubtful they had with them that night… considering this crime scene looks as though it was planned and targeted).
I do think the person who did this had been there before though. On a night where they did have their cellphone.. and that it will be linked to the house/generally area.