This is one of those scam 'charities' that solicits funds for dead cops and spends 99% of the money on overhead. If you give these people money, it's almost all going to fund further harassment.
Thanks, Dodi. This is my second call from a "police charity" in two days. The previous one showed on my caller ID as (720) 403-8503 and sounds like the same group in both cases. Both now have been blocked!