My Friends Facebook Hacked..

Please help everyone, one of my friends facebook got hacked.

That guy first sent her request from another hacked account and did social engineering on my friend , and convienced her to give her password and also convienced to make her send some of her pics( you know what i mean) she gave her account details and that guy now is send all her pic to her friends. And he also hacked her gmail account, she neve gave her gmail account details.

Please tell how do we hack the Hacker,

OR atleast to secure her facebook account back.

we need your help,please everyone do help in securing the account and give your opinions.

I would be really thankful .