The evil in your cat

Hi. I am a cat owner... Well i was. 19 years ago i owned a cat. He was all black. He had yellow eyes. I named him scotty. When i adopted "scotty" i thought he was all so sweet. Until one day... I was getting ready for bed and i was saying goodnight to scotty. I noticed some paper next to him. It said "Hi owner. I see you are going to bed. Dont let the bed bugs bite. Or the claws... Hehe" and it was in bloody hand writing. I thought it was someone playing a joke on me. Luckily i had a baseball bat next to my bed. I grabbed it and shouted "WHOS THERE!? IF YOU SHOW YOURSELF NOBODY GETS HURT" i started walking down the stairs. Scotty followed me and meowed. Almost as if to say "you are going to get hurt master hehe" a few mins later i felt claws digging into me. I looked and scotty. He almost smiled and ran off. The next morning i felt stinging on my back. I saw another note next too scotty. This time it said "master better lock your knifes in a safe. Or you might get hurt" it smelled of the dead. I got a bit scared. I got dressed and put scotty in the carrier. I put him in the car and i drove back to the shelter. I said "take this cat back he is evil" they did not think he is evil but they took him back. I drove back home. I noticed a note lt said "you made the wrong choice master now you must die" it had a knife next to it. The next day i got my home blessed... The next day i opt a call from the shelter to say he was put to sleep. I was so happy. The notes stopped appearing