Thou shall not “murder”......but, it does not mean, the way I understand, that we shall not execute for justice (eye of eye, tooth for tooth?)
The Pastor hasn't said otherwise.
A murder is different then what justice calls for in this case.
Sort of, thou shall not kill, however the Govt is given the sword and act as the Lord’s Ministers in dealing out justice.
In the US “we the people” have merely delegated our Authority to Govt, as Sovereigns we retain the ability to pick that Authority back up.
It is my view that one of the reasons “Why” this sort of heinous actions occur is that Justice or Righteous punishment (or mercy) is no longer practiced, the criminals feel that temporary lust is worth the future cost to them.
God enacted the death penalty right after the Flood and before the Law was given.
IMO, it’s still a valid way to deal with murderers.