A psychiatrist takes complete responsibility when his son is found floating in a swimming pool, stabbed to death. All the evidence points to a young orphan boy as the real murderer. Why is the psychiatrist claiming the murder as his own?

A psychiatrist takes complete responsibility when his son is found floating in a swimming pool, stabbed to death. All the evidence points to a young orphan boy as the real murderer. Why is the psychiatrist claiming the murder as his own?