Those who knew William and Tyler Jensen still have a lot of questions.  What’s next in the investigation behind their deaths? Who will have custody of their bodies? How can they help?

Still, very little information is being released in this death investigation.

The Mesa County Sheriff's Office expects Tyler’s autopsy to be complete by the end of the week, but says it'll be a while before the cause of death is released.

Even though he passed away at Children's Hospital in Denver earlier this week, the autopsy is being done here in Grand Junction by the coroner's office.  Just like his little brother William’s was.

The two and four-year-old became sick after being left by their mother in a running car near Powderhorn.  William died at the scene.

Neither boy's autopsy results will likely be released anytime soon.  The investigation continues.  All documents associated with it are sealed and the sheriff's office says it’s not ruling anything out.