The person in question has repeatly hacked into my cellphone and has gotten IM messages, email messages, text messages and possibly pictures. Is there a way that we can prove that this person is doing this and take some legal action
International Law Attorney
You can bring an action based on tort - right to privacy - intrusion upon private affairs. You have an expectation of privacy in your cellphone, therefore, unless government agency has a right to search your private belongings based on a warrant, that described action above is actionable in tort. I would recommend you consulting local general practitioner in TX.