1: a principle that probable responsibility for an act or event lies with one having something to gain
2: usefulness or utility as a principle in estimating the value of an act or policy
“Cui Bono.” Merriam-Webster.com. Merriam-Webster, n.d. Web. 8 Apr. 2016.
Gaddy, Clifford G.“Are the Russians Actually Behind the Panama Papers?” Brookings Institute. Web. 8 Apr. 2016.