I really am sorry to hear about Falk's death. I loved Columbo. He played the character beautifully always "seeming" like he didn't have a clue (pardon the pun)
but always coming thru in the end.
One more thing (in my best Columbo imitation)
I don't know if you guys remember but a while back (year or so maybe) they had a news clip of him in the L.A. area somewhere. He was talking/shouting, not making any sense. Someone came to guide him away from the cameras. It was so sad.
TIS