NBC - Federal agents have confirmed to NBC News that James Holmes, the suspect in the Aurora, Colorado movie theater massacre, told them where to find what could be key evidence in the case.
The former neuroscience graduate student told investigators about a package he had sent to the University of Colorado's medical campus in Aurora.
Police found that package on Monday, unopened in the school's mailroom.
Inside they found what's described as handwritten details about "killing people."
As the investigation continues, so does the mourning.
51-year-old Gordon Cowden, the oldest victim of the massacre, took his two teenage daughters to the movie. They survived.
He was laid to rest Wednesday, the first of at least 12 funerals for victims of the attack.
After the chaos and killing at the theater there are growing questions in this grieving community about what will happen to the crime scene.
Some say it should be torn down and replaced by a memorial. Others argue the cinema should reopen to show the world the gunman didn't win that night.
Right now the building is still locked down, but could be returned to the owners by the end of the week.