Danger Panda was arrested nearly a decade ago as he was found with his friends robbing, and destroying a local drug store. During the arrest his friends were killed for attacking the police. One of the arresting officers mistook Danger Panda for a victim in the robbery, and as he tried to offer him help, Danger Panda murdered him.
Danger Panda was a psychotic, drug-ridden, and all together bad teenage Panda. He was thrown in a dark hole, tried, and sentenced to execution by lethal injection. He was injected with a substance and told it would be fatal. Instead of dying, however, he woke up in a white jail cell, with an intelligence officer, who informs him that an alternate to execution exists: he can receive covert government training as an assassin. He accepted the bid, was rigorously trained, and returned to society as a seemingly normal and gentle civilian. He had evolved from simply being a bad panda, into a bad ass panda.