Hi Ted! It's me again. this is was I think I found:
When Mr. Van Wyck (alias the great Oskar Werner) goes to the back side of his house to see what Columbo was searching near the window, Columbo tells him that strangely enough, there are no deep footprints. Oskar Werenr is wearing an unusual brown large pair of sun glasses and bents forward to see the ground and takes his glasses over his fronthead with his arm, but at the next image, when he is still bent over, his sunglasses are strangely again of his nose and his left arm in normal position.
Also, in the same episode, when they both watch the video of the murder scene, at a certain point Mr. Werner speaks a word in german. Infact he says..”Schuss” instead of sayng “Shot”, or am I wrong?

Bye, Marco.

Welcome Marco

I'm sorry for your loss. I know losing a member of your favorite 70's detective show can be a real blow. I would like to extends my best wishes to you and your family in these tough times.

Many thanks for your kind reply, Glenn. Where are you from? You really made my day!
And best wishes to you, too.

Marco.