The couple split in April (10) and their break-up later turned nasty after tape recordings of their bitter bust-ups hit the internet.
Russian singer Grigorieva, who shares a young daughter, Lucia, with the Lethal Weapon star, alleges he beat her and knocked out her teeth during a violent altercation early this year (10).
She has now claimed the actor is prone to flipping out and becoming twisted by “evil” when he feels jealous – and she’s urging Gibson to get help for his mood swings.
Grigorieva tells People magazine, “It’s like something comes over him… his pupils dilated, and he’s screaming so loudly. Ugly face – like not even his face. It’s evil. Just evil…
“(He) could be set off by anything, and that’s the problem. Majority of times it was jealousy of some sort… I want him to be treated, evaluated… he just needs to take responsibility.”