Query: Why was he investigated?
Context: Besides parents, Liu Shaokun (刘绍坤), a Sichuan school teacher, was detained on June 25, 2008 for "disseminating rumors and destroying social order" about the Sichuan earthquake. Liu’s family was later told that he was being investigated on suspicion of the crime of inciting subversion. Liu had travelled to the Shifang, taken photos of collapsed school buildings, and put them online.