China’s Scientific & Academic Integrity Watch reports (h/t Danwei) that an arrest has been made in the attack against scientific fraud investigator Fang Shimin, otherwise known as Fang Zhouzi:

Beijing Police Bureau announced last night that they have cracked the case of Fang Zhouzi’s assault. They identified Xiao Chuanguo, the professor who pioneered the controversial “Xiao’s Procedure” and a long-time target of Fang Zhouzi’s fraud exposure, as the mastermind behind the attack. Xiao Chuanguo and four other suspects are currently detained by the police.

Police also said that they had uncovered iron hammers and steel pipes, tools that were used in separate previous attacks on Fang Zhouzi and Fang Xuanchang.