i have been in doubt that someone is stealing my emails from my yahoo inbox. now, i came to know it is true because i found someone else's email address set as my primary email address. i got the email address of that person.

now, i want help from you guys, is there any way i can get that person bring in custody or something? if yes how can i do that? i am really irritated with this hellminded criminal.
only serious suggestions please.
please no bs.