(CNN) -- NFL star Michael Vick has admitted that he and his co-defendants killed dogs that did not fight well in papers filed on Friday with a federal court in Virginia.
NFL star Michael Vick is set to appear in court Monday. A judge will have the final say on a plea deal.
In the agreement, which was signed by Vick, he said he would plead guilty to one count of "Conspiracy to Travel in Interstate Commerce in Aid of Unlawful Activities and to Sponsor a Dog in an Animal Fighting Venture."
The charge is punishable by up to five years in prison and a $250,000 fine.
Federal prosecutors agreed to ask for the low end of the sentencing guidelines.
In the statement of fact, that was filed with the agreement, Vick admitted buying the property that was used for dogfighting but said he did not bet of the fights or receive any of the money from the fight's.
It also said that "collective efforts" by him and two others caused the deaths of at least six dogs.
The filing will include a summary of facts from the Atlanta Falcons quarterback, the source said.
It was not clear what other information the court filing would include.
There was no immediate word from Vick's representatives.
Vick, 27, is scheduled to appear in federal court in Richmond, Virginia, on Monday, where he is expected to plead guilty to conspiracy involving illegal dogfighting.
The 18-page federal indictment against Vick charges him with one count of "Conspiracy to Travel in Interstate Commerce in Aid of Unlawful Activities and to Sponsor a Dog in an Animal Fighting Venture."
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Original indictment (pdf)
Sources close to the case previously said federal prosecutors offered to recommend an 18- to 36-month prison sentence, but that Vick's attorneys were trying to reduce that to less than a year.
The judge in the case will have the final say over the plea agreement.
If the judge accepts the deal, it means Vick will avoid more serious charges that would have been considered by a grand jury.
CNN legal analyst Jeffrey Toobin said that it's common for attorneys to negotiate both the plea agreement and what conduct defendants will admit.
"The defendant wants to admit to as little as possible. The prosecution wants a full admission," Toobin said.
Toobin said Vick also had to think of his football career as he negotiates the plea. See a timeline of the case against Vick »
"If he admits to gambling, that is something that could add to the suspension from his career that ... he is already going to get and jeopardize his ever playing again," Toobin said.
After Vick's indictment last month, National Football League Commissioner Roger Goodell ordered the quarterback not to report to the Falcons training camp, and the league is reviewing the case.
Toobin said the government still has a lot of leverage in the negotiations.
"They have three co-conspirators ready to go into court saying he was involved and doing all this stuff and killing dogs, gambling. So, the feds can say, 'You don't want to plead guilty to what we want you to plead guilty to, fine. Don't plead guilty at all. We're going to have a trial and add more charges and put you in jail for a longer time and end any chance of a football career,' " he said.
Toobin said details of the plea could be dramatic "because we don't know what he's going to say."
Three co-defendants -- Purnell Peace, 35, of Virginia Beach, Virginia; Quanis Phillips, 28, of Atlanta; and Tony Taylor, 34, of Hampton, Virginia -- have already accepted agreements to plead guilty in exchange for reduced sentences