[A.A. Cunningham]

Any sins he is conscious of must be confessed to and absolved by a priest in Confession.

Mortal sins.

[informavoracious]

I was trying to keep it simple for a non-Catholic. Since you are differentiating, perhaps you could define mortal vs. venial sins rather than poking a jab at someone who was trying to help. But that's only a venial sin, no need for you to confess.