By Graham Lee Brewer Staff Writer gbrewer@oklahoman.comBOISE CITY — Only three men stand in the way of people who would bring marijuana into Oklahoma from Colorado, which touches a portion of this 1,900-square-mile county. “We do a lot of overtime I guess,” said Cimarron County Sheriff Leon Apple, laughing. Apple and his two deputies, one of whom works with a drug-sniffing dog, are stretched thin across a wide swath of the Oklahoma plains. And while Apple will likely tell you that is part of the job, to respond to a diversity of situations without backup, he will more than certainly add that since Colorado legalized marijuana in 2014, his office has seen arrests rise significantly. Take the deputy with the canine, he said, who was added to the team within the past year. “He's been here since about September, October, and we've had over 30 pounds of marijuana seized coming out of Colorado,” Apple said. Before that, he said, “I doubt if we've had a couple pounds (per year) at the most, if that much.” Attorney General Scott Pruitt claimed in a federal challenge that Oklahoma's criminal justice system has been negatively affected by Colorado's marijuana laws.Read more on NewsOK.com