CVS review: 10 pills short on prescribed amount

I had three medications filled on 9/23/2014 with one of them being Oxycodone/Acetaminophen 10/325 Qty: 30. When I picked these up they put the 3 prescriptions in a plastic bag and handed them to me. II didn't inspect them individually so I had no idea the Oxycodone was short before leaving the pharmacy. Since I didn't need any of these meds right away, they sat stapled in their bags and inside t plastic bag in my bedroom for about 27 hours. When I opened the paper bags the following evening on 9/24/2014 I noticed the bottle of Oxycodone was too light to have 30 pills. I opened the bottle and counted 20 pills. I counted 3 more times... I was astonished to find such a mistake from the pharmacy. This was my first time filling this med there so I was thinking is it possible that this pharmacy has a serious problem going on with narcotics? So I automatically called and spoke directly to the pharmacist (Syed A Arshad) who filled it the previous day. He bluntly said "no you're wrong" and "I put 30 in there." I told him no I am clearly counting 20 right in front of me and I am just opening the bottle for the first time. Of course, I didn't expect anything to get anywhere with the conversation because of the negative preconceptions people have on any patient who is prescribed narcotic pain relievers. I told him to check the count in stock to be sure nobody stole them in the pharmacy and he refused stating again that he gave me 30. I just simply let him know that it will be handled properly and I will be sure of it. After hanging up I went t the police department to file a report. They will be paying them a visit tomorrow. I was also sure to let the officer know that I am not trying to get the missing 10 pills that belong to me, that I will most likely need, but am just wanting to be sure nothing illegal is going on at that pharmacy. I understand in the situation that I can't expect the pills I am owed. Isn't that enough to prove my honesty? Pharmacies do make mistakes. I have had the wrong label put on the wrong prescription before, and shorted pills from other medication which of course, was simple to get what I was shorted. I really do hope this is just a mistake on the part of the pharmacist and not illegal activity going on. Too bad mistakes like this happen at all... there is no room for this. Disappointed...