MONTGOMERY COUNTY, Md. (WUSA) -- A former Olympic swim coach and founder of the Curl-Burke Swim Club is in police custody in Montgomery County on a child abuse charge stemming from incidents that happened 30 years ago.

Sixty-three-year-old Richard "Rick" Curl is accused of sexually abusing a girl he used to coach in the 1980s. Police say detectives determined that Curl allegedly started inappropriately touching the victim when she was 13. Between the time she was 15 and 18, the abuse "progressed to an inappropriate sexual relationship," say police, in places in Montgomery County, including Curl's homes and the Georgetown Preparatory School swimming facilities. USA TODAY and the Washington Post reported in July thather parents learned about the relationship in 1987 when they read her diary. Curl allegedly paid her parents $150,000 in a settlement to keep them quiet about the relationship.

The victim is now 43 years old. Montgomery County police say they were told about "a past possible sexual abuse" in July and interviewed her in August.

On Tuesday, an arrest warrant was issued for Curl charging him with one count of child abuse.

Curl, who now lives in Vienna, Va., turned himself in to detectives on Thursday morning.

In September, USA Swimming banned coach Rick Curl for life after learning of the allegations about an inappropriate relationship with a swimmer.Curl voluntarily gave up his membership and was added to USA Swimming's list of banned individuals on its website. That same month, the victim released a statement saying: "I am happy to hear that Rick Curl may finally be starting to accept responsibility for what he did to me. I can now only hope that USA Swimming will accept responsibility for refusing to ban Rick Curl when they had knowledge to do so."

In previous reports about the alleged abuse, we learned that the victim revealed that she received a $150,000 settlement from Curl not to tell police about the incidents. USA Swimming said that it learned about the allegations from a former swimmer in 2011, who had heard from a roommate about the inappropriate relationship and legal settlement.

Here's the full timeline of the investigation, courtesy of USA Swimming:

1. April 2011: USA Swimming receives a report from a former swimmer who had heard from his roommate that Mr. Curl had an inappropriate relationship with a minor female swimmer in the 1980s and that a confidential legal settlement had been entered into. USA Swimming initiates an investigation.

2. April 2012: USA Swimming identifies and locates Kelly Currin. USA Swimming's Director of Safe Sport contacts Ms. Currin who agrees to file a complaint. USA Swimming's investigator interviews Ms. Currin. Investigation ongoing.

3. July 23, 2012: USA Swimming initiates a petition against Mr. Curl under its rules, seeking to temporarily suspend his membership at an emergency hearing, and to permanently ban him from membership and place his name on USA Swimming's published list of Individuals Permanently Suspended or Ineligible for USA Swimming membership.

4. August 1, 2012: Mr. Curl waives his right to an emergency hearing, and his USA Swimming membership is temporarily suspended by the USA Swimming National Board of Review, pending a final hearing on the action, set for September 19, 2012.*

5. September 18, 2012: Mr. Curl informs the National Board of Review that he is: voluntarily and permanently relinquishing his USA Swimming membership; waiving his right to a final National Board of Review hearing, and accepting the sanction requested by USA Swimming.*

6. September 18, 2012: The USA Swimming National Board of Review enters an order revoking Mr. Curl's membership, permanently banning him from membership; and directing that his name be placed on USA Swimming's published list of Individuals Permanently Suspended or Ineligible for USA Swimming Membership.

*The Amateur Sports Act requires that a member be afforded the opportunity for a hearing before being declared ineligible. The right to a hearing can be waived.

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