Recommend you retain local counsel to file a motion to quash.

How long can Doc keep somebody over their time

Please do not post personal info on this site. You would have to call your son's lawyer to find out what has happened. We don't know.

Can someting be done about this situation?

It appears the police did what they were supposed to do unless you left something out.

I see no grounds for a lawsuit based on what you wrote.

It is their property so they can remove things put on it.

They do this because it is perfectly permissible under the 4th amendment.

I am so very sorry. You can call the police. It is a crime.

If he removes the monitor he will likely find himself in jail.

the cost of any such lawsuit would far outweigh any potential recovery and would take a year minimum.

Is this legal?

This is a perfectly routine request.