In July 2011, after six years of investigation, the documentary Unveil the Truth I - Government Virus disclosed how the Taiwanese government covered up the truth behind the highly pathogenic avian influenza (HPAI) H5N2. After the film was released, the authorities were still in denial and claimed to the public that legal actions were ready to be taken against director Kevin H.J. Lee. Such response urged Lee to continue his investigation, which later became the sequel, Unveil the Truth II – State Apparatus. In the process, Lee switched from an onlooker to a participant who was actively involved. Measures against the authorities were taken including mailing dead chickens to the officials and pressing charges against them. On March 3rd 2013, under enormous pressure, the officials were finally forced to admit the endemic outbreak of HPAI.