Naked City TV series.

SE04 EP21 - Prime of Life (1963)

"Police detective Adam Flint contemplates his profession while witnessing the execution of a criminal he arrested while young reporter Gene Hackman (Unforgiven) struggles with his own queasiness." (from Amazon.com)

There are 56 more episodes in my collection waiting to be added to TPB - As soon as the first four are well-seeded I'll resume adding more.