Zachary Rye Adams, 29, the man suspected in the kidnapping and death of Holly Bobo, has a criminal history of violence and is well known to those who work in law enforcement.
Adams has served time in jail for domestic violence and aggravated assault charges along with various drug crimes.
"Known him since 2006 when I first came into office," said Decatur County Sheriff Roy Wyatt.
Just last week, Adams was arrested on assault charges after authorities said he held a gun to the head of a woman and threatened to "gut" her.
Now, he is jailed without bond in Chester County and is scheduled to appear in court Tuesday afternoon for an arraignment in the Bobo case.
On his Facebook page, Adams lists his favorite books as 48 Laws of Power, perhaps one of the most popular books in the prison system - and one that teaches readers how to manipulate people and keep them under control - and The Turner Diaries.
The Turner Diaries is a white supremacy manifesto and was noteworthy for being read by Oklahoma City bomber Timothy McVeigh before his arrest.
His criminal history raises plenty of questions, such as why he was out of jail at the time Bobo was kidnapped from her home in April 2011.
Adams' arrest history includes cases of violence against women. Court documents show he pulled a gun on his grandparents and threatened to kill them in 2005. The year before that, he shot his mother in the knee.
"He was back in our facility, arrested several times," Wyatt said.
In 2011, another woman told authorities Adams beat her up and threatened to shoot her just like he shot his mother.
Adams took plea deals on several occasions, and many times he wound up with lighter sentences.
"The court system, the district attorneys, the lawyers, you know, that's all up to them then," Wyatt said.
For years, police and volunteers have searched for Bobo and the man who wore camouflage as he led her away from her home. Now, it's possible he could have been nearby the whole time.
"Does it upset me? Sure it does. Does it disturb? Sure it does, just like it does anyone in this county," Wyatt said. "You know, we've got two different families. You've got the family of Holly, and then you've got the Adams family. And they're dealing with two different things, and it's disturbing to both."
Adams' mother, Cindy Adams, said she is in a state of shock and totally devastated and unable to make any sort of comment at this time.
As for Bobo's mother, Karen Bobo, she thanked everyone Thursday for their continued prayers.
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