A seventh person charged in connection with the fatal beating of Preston Lord pleaded not guilty to first-degree murder, kidnapping and aggravated robbery.
Treston Billey, 18, was arraigned Thursday in Maricopa County Superior Court on charges related to the Oct. 28 attack on Lord, 16, in Queen Creek.
Billey turned himself in to police on March 7 . He was the last of the defendants charged so far in the case to be arraigned…