I'm wrongly accused of stabbing my mom. I didn't do it!
Why did you get accused of stabbing your mom?
The police found the bloody knife under my bed and blood on my hands. I told them I didn't do it.
The weapon used in the assault was found in your room and blood on your hands, so telling the police that you didn't stab your mom was a lying. Tell the cops the truth and take the consequences of your actions.
I just want to punish her and she started it all.
You need to get help. Trying to commit murder or harming someone with a knife is a serious thing to do and you will likely end up in prison because of it.