 On 13 May 2009 , lawyers Zhang Kai and Li <unk> are violently beaten and detained in Chongqing for investigating the death of Jiang <unk> , a 66 @-@ year @-@ old Falun Gong practitioner killed in a labor camp . One month earlier , Beijing lawyer Cheng Hai was similarly beaten by police in Sichuan province for seeking to defend a Falun Gong adherent . 
