Yang broke into a residence on January 2001 and sexually assaulted a woman inside. He was sentenced to eight years imprisonment and had been held at Hualien Prison. After he was released on parole due to good behavior, he committed a series of drug-related, theft, and malicious accusation offenses.

In an attempt to outrun the law, Yang shattered his electronic foot bracelet, which he was required to wear as a condition of his parole. He attempted to flee, but was arrested by the Hualien police in Sanchung. He will serve out his remaining one y ear and five months sentence in Hualien Prison. Hualien district Chief Prosecutor Huang Yi-chun said that the Ministry of Justice is currently studying ways to strengthen the electronic foot bracelet device.