The suspect: The mountain lion known as P-22, in a file picture. Credit:National Park Service/AP "The evidence is circumstantial. We don't have any video of it taking the koala. We can't say 100 per cent," the zoo's director John Lewis told the Los Angeles Times on Thursday. About a month ago, cameras stationed around the park to record the behaviour of smaller wild animals, such as bobcats and coyotes, roaming the park at night showed P-22 also on the premises. "It was kind of like 'Whoa,' " Lewis said when they saw the six-year-old puma on camera. P-22 has been seen on camera a few other times since then, and once left the remains of a devoured raccoon in its wake.

The victim: Killarney the koala, who is thought to have been killed by a mountain lion in Los Angeles Zoo. Credit:Los Angeles Zoo/Facebook Sometime between the night of March 2 and the morning of March 3, the predator visited the koala enclosure, Lewis thinks. That's where it probably found Killarney, 14, the oldest koala in the exhibit, on the ground, unprotected from the elevation the trees provide. Koalas live to be 12 to 15 years old, Lewis said. "She was very individual," Lewis said of the koala, who had no offspring and hailed from Australia. "At night, for whatever reason, it was typical for her to walk around. The other koalas were up in the trees."

There was no blood trail in the enclosure, and no fur to indicate a violent attack, he said. The koalas were kept in an open enclosure surrounded by an 2.5-metre high wall. "He had to jump down into the enclosure and jump back out with the koala," Lewis said of the predator. "It's a pretty good feat in itself. It was a pretty quick snatch." Employees noticed something was amiss the following morning when they conducted a koala head count. There were only 10, when there should have been 11. Killarney weighed seven kilograms and arrived at the zoo in May 2010. She was born on December 17, 2001, Lewis said. "Unfortunately, these types of incidents happen when we have a zoo in such close proximity to one of the largest urban parks in the country," Barbara Romero, deputy mayor for City Services, said in a statement.

"We are investigating the circumstances of the koala's disappearance, but in the meantime, we are taking action to ensure that all of our animals are safe. The koalas have been removed from their public habitats for now, and other animals are being moved to their night quarters when the zoo closes," she said. If P-22 was behind the attack, it wouldn't be a complete surprise, National Park Service official Kate Kuykendall told KNBC-TV. "This wouldn't be an example of him behaving aggressively or abnormally," she said. "Whether it's exotic pets or exotic animals, or our own domestic pets, we need to make sure they're in safe enclosures or brought in at night." LA City Councilman Mitch O'Farrell took a different tack. In a statement released to local media outlets, he suggested it was time for P-22 to find a new home. "Regardless of what predator killed the koala, this tragedy just emphasises the need to contemplate relocating P-22 to a safer, more remote wild area where he has adequate space to roam without the possibility of human interaction," O'Farrell said.

"P-22 is maturing, will continue to wander and runs the risk of a fatal freeway crossing as he searches for a mate. As much as we love P-22 at Griffith Park, we know the park is not ultimately suitable for him. We should consider resettling him in the environment he needs," he said. P-22 has become somewhat of a mascot for Griffith Park, with his majestic image captured in front of the Hollywood sign by a National Geographic wildlife photographer. Last year, the mountain lion caused an only-in-Los Angeles scene - complete with TV news trucks lining the street - when he padded out of Griffith Park and took refuge in the crawl space under a Los Feliz home. He eventually wandered back into the park. State and federal wildlife experts are investigating an uptick in reports over the past year of mountain lions feasting on pets, hobby animals and livestock in and around the Santa Monica Mountains National Recreational Area. Genetic testing from UCLA and UC Davis showed that P-22 was probably born in the Santa Monica Mountains and then crossed the 405 and 101 freeways to make Griffith Park his home in 2012.

"I've told the zoo and other land owners with animals, it is their responsibility to protect those animals with full enclosures and proper fencing," said Jeff Sikich, a National Park Service biologist and expert on local mountain lion populations. "Otherwise these mountain lions are being rewarded with free meals by simply going into pens where animals can't run or hide." Zoo officials have added even more cameras since last week's attack to see if they can find how P-22 is getting into the park, Lewis said. Los Angeles Times