Jumping the moat is not the same as getting out of the enclosure. I still have not seen anyone say this tiger or any other tiger had actually gotten out before.
Still, "before" isn't the issue ~ fact is the tiger got out this time!
There was a report from a retired Zoo-keeper from that zoo....said that he and a co-worker discovered a tiger walking on the top fence...thay shouted at it and the tiger jumped back.
He said they filled the moat to 4 ft depth.
Some years later the tiger died of natural causes and the Zoo got some new tigers.....as they were young the moat was drained....but never re-filled.
It was posted here just a few days ago that a retire keeper said one was found walking on top of the wall about twenty years ago and that water was put in the moat until that cat died.