Supreme Court Chief Justice Lourdes Sereno sends President Duterte a letter of concern.
This comes after Duterte revealed on Sunday a list of politicians, judges, police and soldiers allegedly involved in drug trade.
In the letter, Sereno had expressed her apprehension about the President's public declaration of names of personalities accused of involvement in illegal drug trade.
She sent her letter to Duterte through Justice Secretary Vitaliano Aguirre.
One of the judges named by Duterte had been dead for 8 years.