The jury deliberated for about 90 minutes, and Stinson hugged defense attorney Brian Butler after the verdict was read.
"That's why they came back quickly, because he was innocent," said Butler, who characterized the prosecution as a "witch hunt." Stinson left without speaking to reporters.
Players said he ordered the gassers as punishment for the lack of effort they showed at practice on a day where the temperature and heat index were both 94 degrees.
Prosecutors relied on a series of Gilpin's teammates who testified that several teens became ill during the gassers, vomiting or bowing out of the running with ailments.
Several medical and athletic training experts also testified for the prosecution, saying Gilpin suffered from exertional heat stroke, which led to his death. One witness, University of Connecticut associate professor Douglas Casa, said Gilpin could have been saved if he'd been immersed in ice water almost immediately after collapsing on the field.
Gilpin's mother, Michele Crockett, said the trial told the story of what led up to her son's death and was "an uphill battle" for prosecutors. But because the public heard the details of what happened, the trial was worth it, she said.
"We feel fortunate that it was even brought to the jury," Crockett said. "We can live with it. We can live with that."
"We know Max didn't die in vain," said Gilpin's father, Jeff Gilpin.
One of the prosecutors, Assistant Commonwealth's Attorney Leland Hulbert, said he hopes the case prompts coaches to pay closer attention to their players.
"I do think some good will come out of this trial," Hulbert said.
Stinson's father, Don Stinson, said his son was relieved and the family knew all along he did nothing to harm Gilpin.
"All he wants to do is help young people," Don Stinson said. "It's been a long year."
Some jurors, including the jury foreman, declined to comment as they left the courthouse Thursday afternoon.
Stinson's defense attorneys relied on Pleasure Ridge Park players who testified that, while they ran sprints, there were only a few more than normal. Three of Gilpin's classmates, along with his stepmother, testified that Gilpin complained of not feeling well throughout the day he collapsed.
Defense medical experts told jurors that it appeared a combination of heat, the use of the dietary supplement creatine and attention deficit disorder drug Adderall, and being ill were the main factors that contributed to Gilpin's death, which they called an accident.
The medical experts also said little could have been done to save Gilpin because his temperature was so high for so long before he made it to the hospital and began cooling down.
Sheldon Berman, superintendent of Jefferson County Public Schools, said in a statement that Stinson, who has been working in a non-instructional position, is now cleared to return to teaching and eligible to apply for a coaching position. Berman said administrators will meet with him to determine his future placement.
Jimmie Reed, executive director of the Kentucky Football Coaches Association, said he followed the trial daily and expected most of the coaches in the state were doing the same. He said a conviction would have had lasting ramifications for all teams.
"Any type of coaching where you're dealing with student-athletes, where there's some type of tragic accident, then it would have been scrutinized to the liability of the coach no matter what the sport was," he said.
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Associated Press Writers Dylan T. Lovan and Malcolm C. Knox contributed to this report.
