", is a Latin phrase about identifying crime suspects.
It depends on the fact that crimes are often committed to benefit their perpetrators; especially financially.
L. Cassius ille, quem populus Romanus verissimum et sapientissimum iudicem putabat, identidem in causis quaerere solebat, cui bono fuisset?
Lucius Cassius, whom the Roman people used to regard as a most honest and most wise judge, was in the habit of asking time and again in lawsuits: "to whom might it be for a benefit?"
"[2] American sociologist Peter Blau has used the concept of cui bono to differentiate organizations depending on who has primarily benefited: owners; members; specific others; or the general society.