Unleashing the Demons (2019)

Released from a mental inpatient ward after becoming convinced that he is possessed by a demonic entity, Derek is still reeling from the mysterious deaths of his classmates five years prior. Taken in by his friendly cousin April, Derek is terrified that the demons within him will return despite reassurance from doctors that it's all a figment of his imagination. But when increasingly violent incidents begin to take place, April suspects that there is more to the situation than simply mental illness, and turns to demonologist Lucas for help.