Is this sentence correct?
After the Jhon's conviction, he was hunged by his arms and beat up.
It is not! But it's a tricky one isn't it?
After John's conviction, he was hung by his arms and beaten up
anged is only used when we want to refer to the killing of a human being and the person needs to be suspended by the "neck" !
After John's conviction, he was hanged to death