His Rap sheet:
http://ftpcontent.worldnow.com/wsmv/AdamsCH.pdf
He lived in a house he inherited from his father. His grandfather lives on the property also.
He once shot his mother in the knee during an argument.
His grandfather has had to call the police on him multiple times.
He also assaulted a law enforcement official (a park ranger IIRC) shortly before his arrest for the Bobo murder.
A woman by the name of Heather Sullivan was assaulted outside her home by a male subject who was never caught. After seeing ZA on the news, she claimed it was him who assaulted her.
http://www.cbsnews.com/news/holly-bobos-alleged-killer-tied-to-previous-abduction-try/
Zachs former step father stated that during the time he was married to Zachs mother, he was so afraid of Zach that he slept with a meat cleaver next to him. The couple eventually had to get a restraining order. The stepfather suspects also that Zach may have been involved in Holly's murder.
http://wreg.com/2014/03/08/zachary-adams-former-stepfather-speaks-out/
Zach is said to have also threatened both of his grandparents with a shotgun.
Shortly before his arrest for Holly Bobo's murder, he was arrested for aggravated assault when he held a gun to his girlfriend's sisters head and threatened to "gut her" with a knife.
http://wreg.com/2014/03/06/zachary-adams-violent-past-revealed/
According to the TBI, shortly after Zach's arrest, he tried to send a message to his brother Dylan (through another inmate) threatening to put him "in the hole beside her" if Dylan didn't "shut his mouth". Dylan Adams had spoken with the TBI about having seen Holly with Zach after the abduction. His statements were the reason for Zach's arrest, and for the search of Zach's home.
http://wreg.com/2014/04/01/new-charge-for-zach-adams-in-holly-bobo-case/
and sadly, the list goes on...