Fatal lion attack in California

Dianna Hanson was killed on March 6, 2013 after being mauled by a lion. The 24-year-old was a volunteer at Project Survival Cat Haven, a private zoo outside of Fresno, Calif. — Facebook

Dianna Hanson was killed on March 6, 2013 after being attacked by a lion. The 24-year-old was an intern at Project Survival Cat Haven, a private zoo outside of Fresno, Calif.

Read more: Lion killed woman as she was cleaning enclosure

Dianna Hanson, a 24-year-old intern at the Cat Haven in Dunlap, Calif., was killed by a lion at the exotic animal park on March 6, 2013.

Couscous, a 4-year-old lion, fatally attacked Hanson when she entered his enclosure alone. The lion was later shot as rescuers tried to save Hanson.

A picture of Dianne Hanson from her Facebook. — Facebook

Dianna Hanson, a 24-year-old intern at Cat Haven, was killed by a lion in its enclosure on Wednesday.

The Seattle-area intern had loved lions and tigers since childhood, "was absolutely fearless" around them and hoped to work at a zoo after her six-month internship, her father told The Associated Press.

Dianna Hanson, a 24-year-old volunteer at Cat Haven, was killed by a lion in its enclosure on Wednesday. — Facebook

"She was at ease with those big cats," Paul Hanson, an attorney, said of his daughter. "They liked her."

Dianna Hanson, a 24-year-old volunteer at Cat Haven, was killed by a lion in its enclosure on Wednesday, March 6. — Facebook

Dianna Hanson's father, Paul, said that working at Cat Haven was a dream job for her.

Dianna Hanson, a 24-year-old intern at Cat Haven, was killed by a lion in its enclosure on Wednesday, March 6.

As a cub, Cous Cous appeared on "Ellen"

Screen_Shot_2013-03-07_at_1.01.04_PM.png — CBS News

An older photograph of Cous Cous the lion. Investigators still don't know what provoked Couscous to attack. He was once featured on the "Ellen" talk show when he was a few months old.

The entrance to Cat Haven, the exotic animal park in central California where 24-year-old Dianna Hanson was killed by a lion, in Dunlap, Calif., March 6, 2013.

An officer guards the gate near at the entrance to Cat Haven, the exotic animal park in central California where 24-year-old Dianna Hanson was killed by a lion, in Dunlap, Calif., March 6, 2013.

This Oct. 12, 2012 photo released by JP Marketing shows a 4-year-old male African lion named Couscous at Cat Haven, a private wild animal park in Dunlap, Calif. The lion had been raised at Cat Haven since it was a cub. He was shot and killed by police after he had attacked a 24-year-old volunteer.