Young couple goes on van tour of US, boy comes back with van - no girl

I know they can't but I wish they'd say what the cause of death was. We are only going to run rampant with speculations! There have been a few other u tubers/influencers/social media murders, but this case is the mack daddy with the amount of scrutiny. She had 500,000 subs on u tube, not sure what she had on IG or wherever else ... did he think people would just not notice?