Called and left no message. Came in as private caller. More and more the telemarketer calls are coming in as private caller.

They told me they were working with the Alabama state troopers office, to take up donations for them

My brother is a State Trooper.  They do NOT make this type of call.  (I called and asked him when I saw your post.)
I just got a call from the same number and  did a search to see if anyone else had gotten the same.  Apparently several of you folks have gotten the same today.  I didn't answer, and they did not leave a message.  My caller ID said the call was from " 10517241100187" in the place where the name should be... and then the number 205-413-8553.  We are in North Alabama (256) area code.  The (205) is from central Alabama-- around Birmingham.

Are they calling themselves Fireco? These people harass elderly, disabled, then then laugh about it sitting around their tables. My friend used to work for them VERY briefly and was so disgusted he quit after a couple of weeks. They are located at 3322 Memorial Parkway SW, Huntsville,  AL  35801-5335 and their phone number is (256) 261-1370. The boss is named Kevin O'Brian (O'Brien whatever). I suggest you tell them yeah but don't send anything and keep telling them you don't know what happened to it in the mail. Mess with them.

Called rang twice then disconnected itself. Spam caller, beware