Athletic director Jeff Long announced his decision at an evening news conference and laid out a stunning laundry list of misdeeds against the man he hired away from the Atlanta Falcons four years ago.
They included ignoring multiple chances over the past 10 days to come clean to Long about a relationship that had crossed the line from infidelity into workplace favoritism.
"He made the decision a conscious decision to mislead the public on Tuesday, and in doing so negatively and adversely affected the reputation of the University of Arkansas and our football program," Long said, choking up at one point as he discussed telling players that their coach was gone. "In short, coach Petrino engaged in a pattern of misleading and manipulative behavior designed to deceive me and members of the athletic staff, both before and after the motorcycle accident."
The 51-year-old Petrino, a married father of four, had maintained an inappropriate relationship with 25-year-old Jessica Dorrell for a "significant" amount of time and at one point had given her $20,000, Long said.
He would not disclose details of the payment, or when the money changed hands, but said both parties confirmed the "gift." Kevin Trainor, a spokesman for Long, said the money came from Petrino, not university funds.
Petrino, who was fired via a letter from Long, issued a lengthy apology and said he was focused on trying to heal his family.
"All I have been able to think about is the number of people I've let down by making selfish decisions," he said. "I chose to engage in an improper relationship. I also made several poor decisions following the end of that relationship and in the aftermath of the accident. I accept full responsibility for what has happened."
Dorrell, a former Razorbacks volleyball player, worked for the Razorbacks Foundation before she was hired by Petrino on March 28, four days before their accident on a winding rural road. Long said she was one of three finalists out of 159 applicants and got the job after a time frame he said was shorter than usual.
Petrino never disclosed his conflict of interest in hiring Dorrell or the payment, Long said.
"Coach Petrino abused his authority when over the past few weeks he made a staff decision and personal choices that benefited himself and jeopardized the integrity of the football program," Long said.
It was a shocking ending for Petrino, who has built Arkansas into a Southeastern Conference and national power over four seasons, including a 21-5 record the past two years. But Long made it clear that the success on the field was overshadowed by repeated deceptive acts and that no one was more important than the program itself.
Long said Petrino was fired "with cause" — meaning he will not receive the $18 million buyout his contract called for — and there were no discussions about ways to keep Petrino at Arkansas.
Long said he met with Petrino on Tuesday morning to inform him there were grounds for termination and that the coach was "concerned" about that. Long followed up by sending Petrino a letter Tuesday afternoon to formally notify him that he had been fired.
Long said he has not spoken with Petrino since sending the letter.
"I chose to do it in writing because that's the terms of his contract," he said.
Long declined comment when asked about Dorrell's job status.
She was "at one point" engaged to Josh Morgan, the athletic department's director of swimming and diving operations, according to a person with knowledge of the situation who spoke only on condition of anonymity because the details have not been disclosed. The person said Morgan was still employed at the university.
Petrino finishes his tenure at Arkansas with a 34-17 record in four seasons, leading the Razorbacks to a No. 5 final ranking last season and a Cotton Bowl win over Kansas State. There was talk of Arkansas challenging the two powerhouses in the SEC West, national champion Alabama and national runner-up LSU.
All that ended April 1, which Petrino at first described as a day spent with his wife at a northern Arkansas lake.
Instead, he and Dorrell went for a ride and skidded off the road in an accident left him with four broken ribs, a cracked vertebra in his neck and numerous abrasions on his face. The avid motorcycle rider said the sun and wind caused him to lose control on the two-lane highway about 20 miles southeast of Fayetteville.
What he failed to mention, both at a news conference two days later and to Long for two more days, was the presence of Dorrell.
That revelation was made public when the state police released the accident report. Petrino, tipped off by the state trooper who usually provides security for him during the season, informed Long of Dorrell's presence 20 minutes before police released the report to the public and admitted to what he called a previous inappropriate relationship with Dorrell.
Long placed Petrino on paid leave that night, saying he was disappointed in Petrino and promising to review the coach's conduct.
As the review continued, state police released the audio of the 911 call reporting Petrino's accident. It revealed Petrino didn't want to call police following the crash, and a subsequent police report showed he asked if he was required to give the name of the passenger during the accident — signs Long took as a cover-up attempt.
Petrino was forthcoming about Dorrell's name and presence with police, but only after misleading both Long and the public during his news conference. The school even released a statement from Petrino's family the day after the accident that said "no other individuals" were involved.
The proved not to be the case and the fracture in trust, along with questions about Dorrell's hiring by Petrino to be the school's student-athlete development coordinator, proved to be too much for Petrino to overcome.
"Our expectations of character and integrity in our employees can be no less than what we expect of our students," Long said. "No single individual is bigger than the team, the Razorback football program of the University of Arkansas."
Petrino took the school to its first BCS bowl game following the 2010 season, losing in the Sugar Bowl to Ohio State, and improved his win total in every year. Arkansas was 5-7 his first season in 2008, 8-5 the second before finishing 10-3 and 11-2 during his last two seasons.
The coach's tenure with the Razorbacks began under a cloud of national second-guessing following his departure from Atlanta 13 games into the 2007 season. His tenure with the Falcons was the shortest for a non-interim coach since the 1970 NFL-AFL merger.
His departure was so sudden that Petrino left farewell notes in the lockers of the Atlanta players rather than telling them of his resignation in person. He was introduced later that night as the new coach of the Razorbacks, carrying with him a vagabond image after holding 15 jobs for 11 different programs/organizations in 24 seasons.
In his statement, Petrino said he and his staff had left the program in better shape and wished for its success.
"As a result of my personal mistakes, we will not get to finish our goal of building a championship program," he said. "My sole focus at this point is trying to repair the damage I've done to my family. They did not ask for any of this and deserve better. I am committed to being a better husband, father and human being as a result of this and will work each and every day to prove that to my family, friends and others.
"I love football. I love coaching. I of course hope I can find my way back to the profession I love. In the meantime, I will do everything I can to heal the wounds I have created."