a case in point

case in point

An example that demonstrates a point being made as truthful or correct. It's important to always encrypt your data so hackers can't steal it. The recent data breach is a case in point.
See also: case, point
Farlex Dictionary of Idioms.

a case in point

A case in point is an example of something you have been talking about. Note: In the first two expressions, a case is a matter that is being dealt with by a lawyer or doctor, rather than referring to a box or suitcase. Anger can harm the person who experiences it. The person who leaves after an argument and drives dangerously fast to work is a case in point. Meeting the needs of future generations may need action now. Protecting the environment is a case in point.
See also: case, point
Collins COBUILD Idioms Dictionary, 3rd ed.

a case in point

an instance or example that illustrates what is being discussed.
See also: case, point
Farlex Partner Idioms Dictionary

a case in ˈpoint

a clear example of the problem, situation, etc. that is being discussed: Many of the students are from Latin America. Carlos is a case in point — he’s from Colombia.
See also: case, point
Farlex Partner Idioms Dictionary
See also:
  • case in point
  • above the law
  • a steal
  • be a steal
  • get down to the facts
  • with (one's) hand on (one's) heart
  • with your hand on your heart
  • be as good as (one's) word
  • be as good as your word
  • to be truthful