Just an observation at this point and another question for those out there. It was posted earlier that the Texas Rangers and the FBI were involved in this case. The Rangers I can understand, but the FBI being involved usually means a federal law has been broken. The only one I can possibly see here is kidnaping, which would/could men Kaytlynn was taken and had not went of her own free will. Has it been confirmed the FBI is involved and if so was there a reason given. If she was in fact taken, how does anyone know how she arrived at the landfill and what route her body took to arrive there. Our best guess is via trash pickup truck. Also if she was taken, she may have been taken out of the complex before her death. That would move the crime scene. I'm praying LE gives us some solid answers soon. Way to much mystery to this case. All of this is Just My Own Opinion.
I do not know beyond a doubt that FBI is still involved in the investigation. However it was initially reported in MSM that they were. As someone pointed out, the possibility of a kidnapping is one reason. Also, Texas has a huge problem with sex trafficking so that could be another reason for FBI involvement at the beginning of the investigation. We still do not know what law enforcement knows so we don't know if any federal laws were broken. Does anyone know if the perp could be charged with kidnapping as well as murder? IMO, whether or not the FBI is still involved depends on what LE has learned during their investigation & we don't have a clue as to what that might be. I do think they know a great deal but are having trouble finding enough physical evidence to develop an airtight case. JMO of course.