This is the second of his three appearances as a Columbo villain.
At the exact moment a massive clock tower at the stadium chimed (which happens every hour), there is no sound of the chimes on the recording. The Most Crucial GameColumbo : Season 2 Episode 3
Columbo notices the victim was found in the pool, but the water in his lungs doesn't match the pool's chemical balance perfectly. This is the second of his three appearances