Without knowing where the home is physically located, this is going to be an issue. Usually you can check postal and tax assessor records regarding the owner of a property. Then write the owner requesting their insurance info. In this case, your going to need an attorney in order to pursue an action to compel this information. Go see a personal injury attorney as soon as possible.
I agree with the above attorneys that the exact status of the account needs to be clarified before the question can be definitively answered. You mentioned that your mother wanted you to have the remainder of assets in the account, was that intent memorialized? In any event, you should consult an estate attorney locally for complete guidance and advice.
You need to include information regarding your mother's injury, ie was it the result of an accident, slip and fall, act of another, etc. Was she injured at the facility or by workers at the facility. While you certainly should not stop paying the bill, I suggest you seek out the help of an attorney specializing in nursing home personal injury related matters. It's difficult to answer your question without knowing more facts, however.
If you have not already done so, retain a local personal injury. He/she will be able to obtain insurance omits through discovery or even just by contacting the insured's insurance company. In my past experience, taxi cabs usually carry minimum liability policies, so you may want to consider a under insured motorist claim if that is the case (provided you insurance coverage allows for same). In any event, make sure you see an attorney and make sure you get to the right doctors and follow their...
You may have parked yourself. Into a problem. I suggest you pick up the report and then go see a local municipal or personal injury attorney. In all likelihood , if your car was parked somewhere it shouldn't have been, you will be precluded from recovery.
Assuming you carry the verbal threshold or limitation on lawsuit option on your insurance policy (as the majority of people do these days), you will need a doctor - I don't know what kind of doctor because you don't specify your injury - but I will presume an orthopedist, to review your old and new MRIs, do a comparison and then comment on any change seen in the prexisting injury. Supposing there is some objective evidence of aggravation, your doctor will have to relate the change to the new...
You could have a case of false imprisonment, you should go see a local personal injury attorney who can better advise you of your rights. At a store like Costco they probably have pretty good surveillance footage which maybe strengthen your case if it shows security acting unreasonably. Get to an attorney ASAP so they can make sure that Costco preserves rather than destroys the footage.
Contact a local medical malpractice attorney as the statute of limitations often begins to run upon discovery of the injury. Your summary does not provide a time line, but I suggest you contact an attorney ASAP to protect your rights.
Without taking out my old copy off the UCC, credit card purchases are much easier to dispute. Thinking of using your debit card as writing a check...as soon as that check clears, your out of luck. I would call your bank for the particulars but generally, you have greater rights when using a credit cards. Franky, I only recommend using a debit card to withdraw cash or in an emergency.