com·plic·i·ty 
/kəmˈplɪsəti/ noun
/kəmˈplɪsəti/ noun [noncount] formal : the act of helping to commit a crime or do wrong in some way
▪ There's no proof of her complicity in the murder. ▪ He acted with his brother's complicity.
▪ There's no proof of her complicity in the murder. ▪ He acted with his brother's complicity.
