One might contend that public perceptions of the gormlessness of the Royal Canadian Mounted Police (RCMP) and the Canadian Security Intelligence Service (CSIS) plus the amateurish conduct of the suspected conspirators might explain [it].
Source: wiktionary
The facial expression can be mask-like, almost frozen in an attitude which may suggest dissatisfaction, surly sulkiness, hatred, resentment, sadness or possibly just general gormlessness.
Source: wiktionary
Nevertheless he began to feel off colour and when, eventually, the venom reached his brain it had the effect of increasing, rather than alleviating, his gormlessness.
Source: wiktionary