The Adopted One (2020)

A little boy named Jonathan was adopted at the age of 8, after being in and out of so many foster homes while also being bullied. Due to suffering so much abuse, both physically and mentally, by his last foster parents, who he murdered. He was entered into a mental institution, which he broke out of after spending 30 years of his life in there and after finding out that he had a disorder called schizophrenia. Then, the killings never stopped.