When Leaf was served papers for the hearing, he was "less than cooperative," according to the report.
"He got angry, swore at staff, refused to sign off on the witness form and threw the hearing notification papers on the floor," the report said.
Leaf will remain in the state prison until at least June 30, when he becomes eligible for parole, Anez said. That does not mean he will be released, but he will receive a hearing before the state Board of Pardons and Parole.
James Farren, the district attorney in the Texas county where Leaf was previously given probation in a plea agreement for drug charges in 2010, said his office will move to bring Leaf back to Randall County, where he could stand trial. The original Texas case stems from accusations that Leaf stole prescription pain medicine from a player's home while he was a coach at West Texas A&M.
If Leaf ends up getting prison time from a judge in Texas, he would return to Montana to serve out his time there. He would get credit for his Montana prison time in Texas, Farren said.
Farren said he gave Leaf a chance with the Texas plea deal. The Montana courts gave him another chance, he said.
"It doesn't matter how many chances he gets," Farren said.
Leaf was the No. 2 pick in the 1998 NFL draft, but his short-lived pro career earned him the reputation as one of the biggest busts in NFL history.
An investigation began in March 2011, after Great Falls postal workers reported they were suspicious of frequent packages Leaf received by paying COD charges of $500.
Central Montana Drug Task Force officers and Leaf's parole officer confronted the former quarterback and found a container with 28 oxycodone pills inside and another container with a prescription made out to an acquaintance.
The acquaintance said Leaf had entered his home without permission, and Leaf was arrested.
Shortly after his release, two Cascade County residents told authorities they found Leaf inside their home.
The couple reported three different prescription medications missing.
The Great Falls Tribune first reported Leaf's imprisonment Thursday.
AP writer Betsy Blaney in Lubbock, Texas, contributed to this report.