Dissemble

verb:to present a false appearance; to disguise one's real intentions or character

The villain could dissemble to the police no longer - he admitted the deed and tore up the floor to reveal the stash of stolen money.

Synonyms: act; affect; assume; camouflage; cloak; counterfeit; cover up; disguise; dissimulate; fake; feign; mask; masquerade; pose; pretend; put on; sham