A team of investigators are trying to determine what triggered an African lion to turn on Dianna Hanson at a big cat sanctuary in Dunlap, California.
The Cat Haven sanctuary remained closed today, but its founders told reporters that they are cooperating with the police investigation into Hanson's death.
Hanson, a 24-year old intern was inside the lion's enclosure by herself Wednesday when the four-year-old, 350-pound male lion mauled her to death. The authorities later shot and killed the animal.
OutFront tonight: Dianna Hanson's father Paul Hanson joins Erin Burnett.
Tune to Erin Burnett OutFront at 7p and 11p ET on CNN.