Authorities located 23-year-old Arron Lawson after receiving a tip from someone who spotted him, Lawrence County Sheriff Jeffery Lawless said. He seemed worn out, the sheriff said.
Lawson is being held on charges of murder and aggravated murder. It wasn't immediately clear whether he has an attorney.
He was arrested roughly 12 miles south of where authorities found three adults dead in a house trailer on Wednesday evening and later found the body of 7-year-old Devin Holston apparently hidden, FOX8 WJW-TV reports.