(AP) — A grand jury will begin investigating allegations of wrongdoing against the Tulsa County sheriff's office, which came under scrutiny after a reserve deputy shot and killed an unarmed and restrained suspect because he says he mistook his firearm for a stun gun. Among the accusations that the grand jury is expected to consider after convening Monday is whether Sheriff Stanley Glanz gave special treatment to the reserve deputy, Robert Bates, who was a close friend of Glanz's and had served as Glanz' campaign manager in 2012. A civil rights group, We The People Oklahoma, gathered the thousands of signatures required to empanel a grand jury after a after a 2009 memo was leaked that called into question whether Bates was qualified to do his job. The grand jury process allows residents a direct way to pursue grievances against their government, said John David Luton, a prosecutor with the Tulsa County District Attorney's Office.