Anon is a lawyer

Cops hate lawyers

No proof he was going too a tip doesnt constitute probable cause. They had no right to enter

I think it's still a welfare check. I think they can go in in certain circumstances with that. Can't remember all the rules about it though.

Yes cops are permitted to force entry for welfare checks, especially if a family member called in the concern, however if they are told to leave by the individual in question after making face to face contact they have little choice unless the individual is showing obvious mental distress or shows signs of attempted self harm. The cops will ask the person questions and if they meet a certain criteria the cops can institute a protective custody and transport the person for further medical evaluation. Cops do a similar thing during domestic incidents (a little hint, one answer is all that's needed to meet the criteria for domestic violence screening, in my state anyway, not so sure about welfare checks though)

It is a joke