What do you call someone who refuses to acknowledge their wrongdoing? [duplicate]

There is a person in my current daily life who never admits his wrongs. He is always quick to blame others first and always believes that he is not wrong. Even when he is proven wrong, he still believes he shouldn't be sorry and isn't wrong.

Is there a single-word adjective to describe this behavior? If not, a better way to describe this person would also make do.

While stubborn and irresponsible fit, I feel like they don't tell the whole story. By this, I mean if I were to say to others that he is very stubborn and irresponsible, it is not implicitly implied that he blames others and never acknowledges his own fault.

Edit: I believe my question is different because the person will also never acknowledge their wrongdoing. On top of blaming others, even after it has been proven to be their fault, they will not admit wrong doing. So aside from blaming others, they refuse to acknowledge the possibility that they have committed a mistake.

Sounds like a remorseless/unrepentant person.

ODO:

remorseless ADJECTIVE

1 Without regret or guilt.

‘We're given to understand that because Charlie is tormented by guilt that he somehow occupies a higher rung on the moral ladder than his unrepentant, remorseless elder brother.’

unrepentant ADJECTIVE

Showing no regret for one's wrongdoings.
‘he was unrepentant and said that his comments were completely accurate’

He sounds like a blameshifter

blameshift:

(biblical) To blame another for one's own wrong-doing. Blameshifting can be caused by pointing the finger at another when trying to save one's skin. (Wiktionary)

The person might be incorrigible

incorrigible: incapable of being corrected or amended

In context, the word usually implies that the person doesn't respond well to criticism or admit fault.

shameless ("insensible to disgrace", having no shame) per MW.

or

unrepentant (not exhibiting shame or remorse) per MW.

also

narcissist (egoism) per MW.

From this prior answer, I particularly like finger pointer.