I believe this is the female Tequila, which is still resident at the zoo as of 2016, she was found living in a box in a garage, along with a serval, belonging to a drug dealer in Ireland. She used to be walked on a lead at nights and was only discovered after a neighbour informed the police.
Her real age is unknown, but if she arrived in 1998 she must have been very young at that time, as she would be nearing her natural life expectancy by now. The zoo have no records of how old she is exactly, or what her origin was prior to the confiscation from the garage.
I find it interesting to discover the history of individual animals.