I've been searching on every columbo site, but can't find an answer to this: it looks like rudy, the uncle victim, changed the will only around 10 days before being murdered, according to what the lawyer says, it seems he had intended to leave the paintings to Dale, instead all of a sudden he decided to leave them to Edna.
I know columbo and edna later have a discussion about this, but I'm not very clear: why the sudden will change about leaving the paintings to edna instead of dale?
Edna tells Columbo something about Rudy wanting his paintings to be appreciated by “the people”. Edna would be a better caretaker of the paintings while Dale would be more selfish. But I’m not sure what motivated Rudy to this conclusion. Did Rudy have a change of his own attitude regarding how the paintings should be appreciated or did Dale do/say something that caused concern for Rudy? I don’t think the episode clarifies this.
Indeed, it doesn't, I watched it again recently, it could've gone either of the 2 ways you mentioned, to me it's very strange that he changed his mind just 10 days before being killed, so perhaps it was indeed to do with dale, a shame that there wasn't a further clarification in the movie about this.