Answer: Antisocial personality disorder (ASPD)
Explanation: Antisocial personality disorder (ASPD) this a personality disorder that is observed in a person above the age of 18 years of age.
Any person with Antisocial personality disorder is likely to behave in a way that is unpleasant to others, feels no sense of guilt after hurting or mistreating others, behaves dangerously and illegally.
Form the above question, Paul who recently killed a cat and hid it under his house has just shown a sign of antisocial personality disorder