What is on Zimmerman's reading shelves and computer searches?

If I were the FBI, I would be looking in George Zimmerman's personal library to see if the Turner Diaries or any other such books are there. Since Zimmerman has not been arrested for the death of Trayvon Martin and no search warrant has been issued, how can a thorough investigation into the mind of the murderer be fully attained? While the investigation is proceeding, Zimmerman has time to destroy evidence, especially on his computer or cellphone...Arrest and properly investigate the murder of Trayvon Martin now!