Person knocking on my window at night killed my cat
So it all started about a week ago. It was 9pm and had just gotten dark, and I was playing video games at my desk in my room. Through my headphones, I thought I could hear noises coming from outside but thought nothing of it, as I have a cat that comes and goes as she pleases into our front yard. A few minutes passed, until I decided to take my headphones off to go and grab a drink from the fridge, when I noticed a very slight knocking at my window. I turned on the light and opened my blinds a little, but couldn't see anybody out there. I once again thought nothing of it, and went back to what I was doing.
The next night, I was awoken at around 3:30 in the morning to a very distinct knocking at my window. I was in a delirious state, but swore I could hear someone's muffled voice coming from the outside. From what I could make out, they were saying something about how they needed to come inside and that they were lost. To give context, I live in a cul-de-sac in quite a compact neighbourhood with most of the houses being close together, so I found it very strange that someone would come to the end of the street to come to someone's window talking about how they were lost. I once again turned my light on and loudly asked what was wrong, but garnered no response. After about 10 to 15 minutes, I fell back asleep as I was too tired and had work in the morning.
About 2 days later, I was in the bathroom getting ready for bed at about 11pm, when I once again heard knocking coming from across the house in my bedroom. I rushed to my front door and turned the porch light on, then went outside with just about enough courage to confront whoever was out there. When I turned my head towards my bedroom window, I saw a figure crouched in a hoodie and shorts with no shoes on, who quickly got up and sprinted away down the street. I called the police, who turned up 10 minutes later telling me that there was nothing they could do as I didn't have any cameras installed, and there wasn't any crime that was committed.
Feeling defeated, I went back inside and decided to go to sleep.
I wish the story ended there, but things got worse the next morning when I woke up to a foul odour coming from outside. I found my cat dead outside, having been stabbed in the stomach. I called the police and told them about the previous nights events, and they said they would take the matter seriously and investigate the surrounding area for any signs of DNA and other things that could help with the investigation. Feeling very distraught, I spent the next day at home grieving the loss of my cat, until at around 6pm I heard a car drive near my house, open and close my mailbox, then promptly get back in the car and speed off. I went outside to see what was going on, and found a bloody broken beer bottle wrapped in plastic inside of my mailbox. I once again called the police, and they're taking the matter very seriously now that they have the possible murder weapon in their possession.
This was a few days ago, and I haven't heard anything back from the police as of yet. I have installed security cameras around my house for just in case this sicko decides to come back for some reason. I have no idea who they could be, or why they would be targeting me specifically.
I will give updates in the coming weeks if anything comes of this. Thank you all