HUNTSVILLE, TX - JANUARY 26:  Martha & Bela Karolyi watch from the side as their facility Karolyi Ranch was named an official training site for USA Gymnastics on January 26, 2011 in Huntsville, Texas.  (Photo by Bob Levey/Getty Images for Hilton)
Bob Levey/Getty Images
HUNTSVILLE, TX - JANUARY 26: Martha & Bela Karolyi watch from the side as their facility Karolyi Ranch was named an official training site for USA Gymnastics on January 26, 2011 in Huntsville, Texas. (Photo by Bob Levey/Getty Images for Hilton)
Now playing
01:14
Nassar victim: Shouldn't have to beg for justice
Now playing
01:18
Judge to Nassar: I just signed your death warrant
larry nassar third sentencing michigan sot_00000000.jpg
larry nassar third sentencing michigan sot_00000000.jpg
Now playing
01:30
Judge sentences Nassar to 40 to 125 years
larry nassar speaks in court sentencing hearing sot _00001007.jpg
CNN
larry nassar speaks in court sentencing hearing sot _00001007.jpg
Now playing
00:50
Nassar: Impossible to convey how sorry I am
Former Michigan State University and USA Gymnastics doctor Larry Nassar listens during the sentencing phase in Eaton, County Circuit Court on January 31, 2018 in Charlotte, Michigan. Last week Nassar was sentenced in Ingham County to 40 years to 175 years in prison.
The number of identified sexual abuse victims of former USA Gymnastics doctor Larry Nassar has grown to 265, a Michigan judge announced Wednesday as a final sentencing hearing commenced. Prosecutors said at least 65 victims were to confront Nassar in court, in the last of three sentencing hearings for the disgraced doctor who molested young girls and women for two decades in the guise of medical treatment.
 / AFP PHOTO / JEFF KOWALSKY        (Photo credit should read JEFF KOWALSKY/AFP/Getty Images)
JEFF KOWALSKY/AFP/AFP/Getty Images
Former Michigan State University and USA Gymnastics doctor Larry Nassar listens during the sentencing phase in Eaton, County Circuit Court on January 31, 2018 in Charlotte, Michigan. Last week Nassar was sentenced in Ingham County to 40 years to 175 years in prison. The number of identified sexual abuse victims of former USA Gymnastics doctor Larry Nassar has grown to 265, a Michigan judge announced Wednesday as a final sentencing hearing commenced. Prosecutors said at least 65 victims were to confront Nassar in court, in the last of three sentencing hearings for the disgraced doctor who molested young girls and women for two decades in the guise of medical treatment. / AFP PHOTO / JEFF KOWALSKY (Photo credit should read JEFF KOWALSKY/AFP/Getty Images)
Now playing
01:58
Nassar survivor: 'Have fun in prison'
Ronald Martinez/Getty Images
Now playing
01:18
Olympic gymnast: We are taking our power back
Getty Images
Now playing
02:36
3 'Fierce Five' Olympic gymnasts allege abuse
Nassar dad emotional
POOL
Nassar dad emotional
Now playing
01:52
Dad lunges at Nassar in court room
Judge Cunningham releases Mr. Margraves without a jail sentence or fine after he apologized for his actions and ensured the court he wouldn't do that again.
CNN
Judge Cunningham releases Mr. Margraves without a jail sentence or fine after he apologized for his actions and ensured the court he wouldn't do that again.
Now playing
02:08
Dad who lunged at Nassar apologizes to judge
CNN
Now playing
02:16
Judge reads from Nassar's letter, tosses it
Simone Biles competes in the floor exercise during Day 2 of the 2016 U.S. Women's Gymnastics Olympic Trials at SAP Center on July 10, 2016 in San Jose, California.
Ezra Shaw/Getty Images
Simone Biles competes in the floor exercise during Day 2 of the 2016 U.S. Women's Gymnastics Olympic Trials at SAP Center on July 10, 2016 in San Jose, California.
Now playing
02:00
Biles: Testifying would have been a step back
meridian township apology to nassar victim brianne randall sot_00004923.jpg
meridian township apology to nassar victim brianne randall sot_00004923.jpg
Now playing
00:52
Town gives emotional apology to Nassar victim
pool
Now playing
00:53
Nassar: Victims' words have shaken me
Additional Embargo:  pool  Additional Source(s):    Date Shot: 1/24/2018   Shipping/Billing Info:       Description:   Projects:   None  Cost Center:   Atlanta National Desk / 20100101    Created By: tagray  On: 1516800382  --------------------------------------------------------------------------------
POOL
Additional Embargo: pool Additional Source(s): Date Shot: 1/24/2018 Shipping/Billing Info: Description: Projects: None Cost Center: Atlanta National Desk / 20100101 Created By: tagray On: 1516800382 --------------------------------------------------------------------------------
Now playing
02:15
Judge to Nassar: I signed your death warrant
Amanda Thomashow
Sonia Moghe/CNN
Amanda Thomashow
Now playing
05:01
Thomashow: MSU covered up abuse (February 2018)
Now playing
02:42
Raisman to Nassar: You touched a child for pleasure
emily morales nassar accuser
CNN HLN
emily morales nassar accuser
Now playing
00:41
Nassar accuser demands apology and gets it
WDIV
Now playing
02:40
Judge: I'd allow what he did to be done to him
A victim makes her "impact statement" to Larry Nassar during a sentencing hearing as he puts his head down in front of Judge Rosemarie Aquilina in district court on Tuesday, Jan. 16, 2018, in Lansing, Mich. Nassar has pleaded guilty to molesting females with his hands at his Michigan State University office, his home and a Lansing-area gymnastics club, often while their parents were in the room. (Dale G. Young/Detroit News via AP)
Dale G. Young/Detroit News via AP
A victim makes her "impact statement" to Larry Nassar during a sentencing hearing as he puts his head down in front of Judge Rosemarie Aquilina in district court on Tuesday, Jan. 16, 2018, in Lansing, Mich. Nassar has pleaded guilty to molesting females with his hands at his Michigan State University office, his home and a Lansing-area gymnastics club, often while their parents were in the room. (Dale G. Young/Detroit News via AP)
Now playing
01:35
Watch Aly Raisman confront Nassar in court
CNN —  

Survivors of Larry Nassar’s abuse say USA Gymnastics coach Martha Karolyi knew in 2015 that the team doctor had been accused of molesting young girls at the training center that bears the Karolyi name.

But she never reported the allegations to Texas authorities and should face charges, the women’s lawyers say.

Gymnasts who say they were molested by Nassar at the famed Karolyi Ranch are expected to speak in a news conference on Thursday to demand criminal sanctions for Martha Karolyi and her husband, Bela Karolyi. Other survivors who were abused by Nassar at Michigan State University are also expected to speak.

The couple, who have denied any wrongdoing, ran the training center, a 2,000-acre compound about 70 miles north of Houston. It became the US Women’s National Team Training Center in 2001 and a US Olympic Training Site in 2011 – during many of the same years Nassar was the national team doctor.

The Texas Rangers are leading an “open and very active” investigation into possible misconduct at the ranch, said prosecutor Stephanie Stroud of the Walker County District Attorney’s Office. The office will likely bring evidence to a grand jury “before the end of the summer,” she said.

“They are interviewing and looking at evidence along with potential offenses,” she said. “This is a big task. It is multifaceted and it spans a long period of time and that’s why the investigation is taking time.”

Who knew what when?

Attorney John Manly deposed Martha Karolyi in 2017 as part of a civil lawsuit filed by former gymnast Mattie Larson, which claims the Karolyis “turned a blind eye to the perpetrator Nassar’s sexual abuse of children at the Ranch.”

According to the transcript of the deposition, which was obtained exclusively by CNN earlier this year, Manly asked Karolyi: “Were you ever advised by any USAG official in or around June 2015 that they had received a complaint that Dr. Nassar had molested a National Team gymnast at the ranch?”

Karolyi answered, “Yes, I did.”

She went on to say that former USA Gymnastics President Steve Penny informed her of the allegations, according to the transcript.

Now, Martha Karolyi’s lawyer says she misspoke in the deposition and he reiterated her previous claim that she had no knowledge of the allegations until the summer of 2016.

01:53 - Source: CNN
Wieber on Nassar abuse: 'We just fought through it'

“It is not uncommon in a deposition for a deponent to misunderstand a question or misspeak. Martha misunderstood the question and misspoke,” lawyer Gary Jewell said in a statement.

“We apologize for any confusion this may have caused and look forward to proving the facts alleged in the Karolyis’ lawsuit at a public trial in Walker County, where her credibility will be solely judged by a jury – as opposed to counsel or the media.”

’She was not precise with her earlier testimony’

The Karolyis stand by the timeline they gave in a lawsuit filed against the United States Olympic Committee and USA Gymnastics, their lawyer said.

The Karolyis are suing the two organizations for canceling plans to purchase their ranch after Nassar’s arrest, citing the “breaches of contract and duties owed to plaintiffs which have resulted in severe damages to plaintiffs’ reputation, health, and real property.”

In the lawsuit, the couple said they were first informed of possible misconduct by Nassar in 2015. According to the complaint, Penny told Martha Karolyi in a phone call that Nassar would no longer be with the USAG program because of treatment concerns. But USAG “never mentioned that the alleged mistreatment was potentially sexual assault nor did they relay the nature of the treatments at issue,” the lawsuit claims.

In the 2017 deposition, Martha Karolyi was asked a leading question regarding whether she was “ever advised by any USAG official in or around June of 2015 that they had received a complaint that Dr. Nassar had molested a national team gymnast at the Ranch?” her lawyer said.

“Multiple objections were made to the question given its irrelevance to sexual assaults alleged to have occurred in prior years. After the objections were made for the record, Martha answered the question (without it being repeated back to her) and she mistakenly answered ‘Yes, I did,’ ” the lawyer said in his statement.

“It was not realized until much later that she was not precise with her earlier testimony,” Jewell said.

“Martha is now taking the opportunity to correct that misunderstanding and make clear that, although she did receive a phone call from Steve Penny during the summer of 2015 regarding Larry Nassar leaving the USAG program, she had no knowledge of allegations of sexual misconduct by Larry Nassar until the summer of 2016.”

Penny resigned last year amid the scandal. Nassar admitted in court earlier this year to using his influence as a trusted medical doctor to sexually abuse young girls over two decades and was sentenced in February to 40 to 175 years in prison.

CORRECTION: This story has been updated to fix a misspelling of the last name of Steve Penny.

CNN’s Linh Tran and Elizabeth Joseph contributed to this report.