The man accused of kidnapping Jayme Closs shaved his head to avoid leaving any evidence during the attack that left her parents dead, police said.

Jake Patterson, 21, allegedly shot and killed Jayme's parents. Their bodies were found October 15 after a mysterious 911 call led deputies to their home in Barron, Wisconsin. The 13-year-old was missing when police arrived, leading to an intense manhunt that ended when she was found alive Thursday about 70 miles from her home.

In anticipation of the crime, the suspect cut his hair so he wouldn't leave behind physical evidence in Closs' home, Barron County Sheriff Christopher Fitzgerald said.

"I can tell you that the subject planned his actions and took many proactive steps to hide his identity from law enforcement and the general public," he said.

It appears Patterson went to the Closs home with the intention of taking Jayme, Fitzgerald said. But while she was his intended target, "nothing in this case shows the suspect knew anyone at the Closs home or at any time had contact with anyone in the Closs family," Fitzgerald said.

Investigators are working to establish a connection and don't believe Patterson and Jayme interacted on social media.

Nearly three years ago, Patterson worked for one day at the same meat products facility where Jayme's parents also worked -- the Jennie-O Turkey Store plant in Barron -- the company's president said. Patterson quit, saying he was moving from the area, according to the company.

Authorities have said they don't believe Patterson crossed paths with Jayme's parents there. Investigators are trying to determine whether he worked at another job in the area. (CNN)