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 / Updated By Stephanie Gosk, Alan Cohen and Tracy Connor 
 
 The accuser at the center of the Dennis Hastert hush-money case sued the former House Speaker on Monday, saying he never finished paying $3.5 million in cash to settle a sexual abuse allegation. 
 
 The man known only as Individual A had only pocketed $1.7 million from the politician when the FBI began investigating red-flag cash withdrawals and learned of their secret deal. 
 
 Now, two days before Hastert is to be sentenced for illegal financial transactions, Individual A has filed suit in Illinois state court, seeking to collect the $1.8 million balance. 
 
 The five-page breach-of-contract complaint contains new details about the case that stretches back to the 1970s, when Hastert was a wrestling coach at Yorkville High School: 
 
 Individual A, then 14, was not yet a student at Yorkville when Hastert, a trusted family friend, invited him to a wrestling camp for high schoolers and then molested him in a motel room, the suit says. 
 
 In 2008, Individual A had a conversation with another person who said they had been abused by Hastert — and that prompted him to confront his former coach, the court papers say. His attorney would not comment on whether that person is one of four former students who prosecutors say have reported abuse, or a new accuser. 
 
 As a result of the motel room incident, Individual A claims he suffered panic attacks for years. They in turn caused unemployment, career changes, depression, hospitalization and long-sterm psychiatric treatment, the suit says. 
 
 Dennis Hastert in a yearbook photo. NBC News 
 
 Hastert's attorneys had no comment on the lawsuit. In a statement earlier this month, they said Hastert "acknowledges that as a young man he committed transgressions for which he is profoundly sorry." 
 
 The Republican, who led the House from 1999 to 2007 before becoming a lobbyist, was never charged with a sexual crime because, prosecutors said, the statute of limitations had passed. 
 
 He pleaded guilty to illegally structuring bank withdrawals to avoid reporting requirements for transactions over $10,000. 
 
 Prosecutors have recommended six months in jail. Hastert, citing his remorse and health problems, is asking for probation. 
 
 Kristi Browne, the attorney representing Individual A in the lawsuit, said he will not be at the sentencing and wants to stay out of the spotlight. "My client is counting on the justice system to do the right thing here," she told NBC News. 
 
 She said Individual A — who uses the pseudonym James Doe in the suit — doesn't have an opinion about whether Hastert should go to jail and isn't necessarily happy that he's been publicly disgraced. 
 
 "I think he would have preferred to have it remain private," Browne said. 
 
 Prosecutors have said they expect two people to testify against Hastert at the sentencing: a woman who says her brother, who has since died of AIDS, was molested throughout high school, and a man known for now as Individual D, who says the coach performed a sexual act on him while giving him a rubdown. 
 
 In the case of Individual A, prosecutors say that after arranging for the teen to share a room with him, he had the boy take off his underwear and massaged his groin under the guise of treating an injury. Hastert, clad only his underwear, then had the teen give him a back rub. 
 
 Browne said that her client didn't associate the episode with his panic attacks and other psychological problems until 2008, noting that many abuse victims blame themselves. 
 
 “Having a conversation where another victim referred to it as having been abused sort of opened his eyes to what actually happened," she said. 
 
 The sordid allegations came to light not because any of Hastert's former students came forward but because a bank worker became concerned about withdrawals the retired lawmaker made between 2010 and 2014 — $9,000 at a time from four banks, a pattern known to regulators as "structuring." 
 
 When the FBI questioned Hastert about the money, he lied and said he just wanted to keep it in a safe place, prosecutors said. His lawyers later contacted agents and told them he was actually being extorted by an ex-student with a false claim of sexual abuse from decades ago. 
 
 With recorders running, the agents had Hastert speak with Individual A and claim he was having trouble coming up with the next payment. They said the other man's tone and remarks were not consistent with an extortion plot. 
 
 Indeed, the lawsuit says that when Individual A asked Hastert for $3.5 million in compensation for "pain, suffering and harm," he suggested bringing in two confidantes and attorneys to draft a "legal" agreement. 
 
 "But Hastert preferred to keep the negotiations strictly confidential promising to 'pay every last dollar' of their agreed monetary settlement," the suit alleges. 
 
 Browne said that she has sent Hastert's legal team documents demanding he pay up and has never gotten a response. ||||| Breaking News Emails Get breaking news alerts and special reports. The news and stories that matter, delivered weekday mornings. 
 
 / Updated By Tracy Connor 
 
 Jailed former House Speaker Dennis Hastert says a man who accused him of sexual abuse should return $1.7 million in hush money because he broke his silence by talking to the feds. 
 
 The demand was made in Hastert's response to a lawsuit filed by the accuser, known only as Individual A, who is trying to recoup the rest of the money the politician promised him. 
 
 "To the extent any contract existed between plaintiff [Individual A] and defendant [Hastert], plaintiff breached that contract," Hastert's lawyers wrote. 
 
 "Plaintiff's breach of conduct resulted in damages to defendant and plaintiff is accordingly required to return $1.7 million to defendant." 
 
 Individual A spoke to FBI agents who contacted him about his agreement with Hastert, but otherwise he has never spoken publicly about his accusations. 
 
 His attorney, Kristi Browne, said it was Hastert who had reneged. 
 
 "Mr. Hastert has decided that rather than live up to his promise to compensate his victim for his molestation and resulting injury, he will ask his victim to pay him," she said in a statement. 
 
 "He admits to agreeing to make payments, but then denies that it is an agreement that he has to keep. His response is predictable and we look forward to entering the discovery phase of the case." 
 
 Dennis Hastert in a yearbook photo. NBC News 
 
 Hastert, 75, was sentenced in April to 15 months in prison for making illegal cash withdrawals to pay Individual A and quash allegations he abused teenage boys while he was a high-school wrestling coach decades ago. 
 
 Although the disgraced power broker was not charged with any sex crimes because the statute of limitations had passed, the judge in the case branded him a "serial child molester" and ordered him to enroll in a sex-offender treatment program. 
 
 Related: Hastert Accuser: 'I Could No Longer Remain Silent' 
 
 The alleged abuse took place well before Hastert became the Republican speaker of the House of Representatives in 1999. A few years after he retired, he was confronted by Individual A about misconduct on a wrestling trip in 1974. 
 
 Hastert agreed to pay Individual A $3.5 million and had forked over $1.7 million of that sum when federal investigators began looking into his unusual bank withdrawals. 
 
 Hastert claimed he was a victim of extortion but after FBI agents interviewed Individual A, they found his account of molestation credible. 
 
 After Hastert pleaded guilty to the financial crime, Individual A sued him, saying he was still owed $1.8 million. In his response, Hastert says there was no legal contract and even if there was, his accuser would have broken it. 
 
 Individual A's "retention of the $1.7 million is unjust," his attorneys wrote. 
 
 Not only does Hastert want his money back, he thinks Individual A should pay his attorney's fees. 
 
 At his sentencing, Hastert admitted he "mistreated" and "took advantage" of former students who came forward to say they were molested -- three of them anonymously. 
 
 "What I did was wrong and I regret it," he said at the time.
– A new legal problem has surfaced for Dennis Hastert ahead of his Wednesday sentencing on financial charges related to payment of hush money over alleged sexual abuse: He never finished the payments, and the accuser has filed a lawsuit. The plaintiff, who says he was 14 when Hastert molested him decades ago, wants the remaining $1.8 million of the $3.5 million he says the former House speaker promised him as compensation, the New York Times reports. According to the lawsuit, which refers to the accuser as "James Doe," Hastert agreed to compensate the man for "trauma he suffered as a result of the admitted sexual molestation and abuse." In the years after the molestation, Doe suffered "severe panic attacks which led to periods of unemployment, career changes, bouts of depression, hospitalization, and long-term psychiatric treatment," the suit states. The agreement was made after the former student confronted Hastert in 2008. After suspicious transactions attracted the attention of the FBI, Hastert claimed he was being extorted by a former student, but investigators recorded a conversation between him and the accuser and decided the agreement did not constitute blackmail. According to the lawsuit, the accuser even suggested bringing in lawyers to draft a formal agreement for compensation, but Hastert "preferred to keep the negotiations strictly confidential," NBC News reports. Other accusations of abuse during Hastert's days as a high school wrestling coach in Illinois will be aired at the sentencing hearing, though the statutes of limitations for sexual misconduct charges expired long ago, NPR notes. Prosecutors have recommended a prison sentence of up to six months.