Arizona Department of Public Safety Director Frank Milstead posted a video Wednesday showing a Yavapai County deputypulling him over on suspicion of excessive speeding while Milstead was off-duty. Milstead was going more than 90 mph on Interstate 17, the deputy says in the video. The speed limit in that area is 75. In a series of tweets, Milstead described the Oct. 12 traffic stop as a "regrettable experience." Milstead was given a warning for speeding, failing to use his turn signal and weaving through traffic, according to the video. On February 10, 2015, Colonel Frank Milstead was selected by Governor Doug Ducey to lead the Arizona Department of Public Safety (AZDPS). From 2010-2015, Frank Milstead served as the Chief of Police for the Mesa Police Department and prior to Mesa PD, he served 25-years with the Phoenix Police Department.