DENVER -- A woman who accused former Denver Broncos cornerback Perrish Cox of sexual assault has filed a lawsuit seeking unspecified damages against Cox and current Broncos wide receiver Demaryius Thomas.

The woman's lawyer, Craig Silverman, says he filed the lawsuit electronically Sunday. A jury in March acquitted Cox of all charges and Cox then signed a two-year contract with the San Francisco 49ers. Silverman says the lawsuit filed anonymously as "Jane Doe," allows the woman to prosecute the allegations in court.

`On behalf of our client, the victim, we will prosecute and prove these charges in a court of law," Silverman said in an email sent to The Associated Press

Silverman said he would decline further comment, adding that the documents filed in the case speak for themselves.

Cox's criminal attorney, Harvey Steinberg, didn't immediately return a message. It was unclear whether Thomas had retained an attorney and a number listed for Thomas was inoperable.

Civil lawsuits have a lower threshold of proof, as opposed to a "beyond a reasonable doubt" standard in criminal proceedings.

The woman became pregnant after visiting Cox's apartment following a night of partying in September 2010. In his lawsuit, Silverman says the woman was drugged at a downtown nightclub, then sexually assaulted at Cox's suburban apartment.

Allegations that the women became overly intoxicated and possibly drugged when they drank lemon shots at the nightclub were well-known during Cox's criminal trial, but prosecutors never sought to prove them. Prosecutors presented a straight-forward criminal case that the woman didn't remember having sex, didn't consent to it, and that DNA tests proved that Cox was the father. Cox attorney presented a case that suggested the woman, as well as Cox, didn't remember having sex.

"For unknown strategic reasons, the prosecution at the criminal trial declined to pursue any claim that a rape drug had been used and instructed its witnesses that they were not to volunteer testimony about any such drugging or suspected drugging," according to the lawsuit.

18th Judicial District Deputy District Attorney Chris Gallo said after the trial that he believed that evidence he and another prosecutor presented was enough to prove the case.

Thomas caught an 80-yard touchdown pass in overtime to beat the Pittsburgh Steelers in a first-round playoff game in January. He had expressed a romantic interest in the woman, and was at the apartment the night she became pregnant.

The lawsuit claims battery, sexual assault and battery, aiding and abetting tortious conduct, conspiracy, outrageous conduct, and negligence, which include failing to ensure the woman's safety.

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Earlier on HuffPost:

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  • Perrish Cox

    Former Denver Broncos cornerback Perrish Cox, right, follows his attorney Harvey Steinberg into the courtroom Thursday, March 1, 2012, in Castle Rock, Colo. Both the prosecution and defense rested their cases Thursday morning, and the jury deliberated for about four hours before leaving for the day, after closing arguments concluded early in the afternoon. Cox is accused of sexually assaulting a woman in his apartment over Labor Day weekend 2010. (AP Photo/Ed Andrieski)

  • Perrish Cox

    Former Denver Broncos cornerback Perrish Cox rest his head in his hands as he waits in the courthouse cafeteria in Castle Rock, Colo., on Thursday, March 1, 2012, as a jury deliberated in his sexual assault trial. (AP Photo/Ed Andrieski)

  • Perrish Cox

    Former Denver Broncos cornerback Perrish Cox, left, talks on his phone as he walks the hallway with his uncle, Ron Davis, outside the courtroom in Castle Rock, Colo., on Thursday, March 1, 2012, as a jury began deliberating his fate at his sexual assault trial. (AP Photo/Ed Andrieski)

  • Perrish Cox

    Former Denver Broncos cornerback Perrish Cox, left, talks on his phone as he walks the hallway outside the courtroom in Castle Rock, Colo., on Thursday, March 1, 2012, as a jury began deliberating his fate at his sexual assault trial. (AP Photo/Ed Andrieski)

  • Perrish Cox

    Former Denver Broncos cornerback Perrish Cox, left, talks on his phone as he walks the hallway with his uncle, Ron Davis, outside the courtroom in Castle Rock, Colo., on Thursday, March 1, 2012, as a jury began deliberating his fate at his sexual assault trial. (AP Photo/Ed Andrieski)

  • Perrish Cox

    Former Denver Broncos cornerback Perrish Cox talks on his phone as he leaves the courtroom in Castle Rock, Colo., on Thursday, March 1, 2012, as a jury began deliberating his fate at his sexual assault trial. (AP Photo/Ed Andrieski)

  • Perrish Cox

    Former Denver Broncos cornerback Perrish Cox arrives at the courthouse where he is on trial fin Castle Rock, Colo., on Wednesday, Feb. 29, 2012. Cox has pleaded not guilty to one count of sexual assault while the victim was physically helpless and one count of sexual assault while the victim was incapable of determining the nature of the conduct. He faces two years to life in prison if convicted. (AP Photo/Ed Andrieski)

  • Harvey Steinberg, Attorney For Perrish Cox

    Defense attorney Harvey Steinberg talks on his phone as he arrives at the courthouse to defend former Denver Broncos cornerback Perrish Cox in Castle Rock, Colo., on Wednesday, Feb. 29, 2012. Cox has pleaded not guilty to one count of sexual assault while the victim was physically helpless and one count of sexual assault while the victim was incapable of determining the nature of the conduct. He faces two years to life in prison if convicted. (AP Photo/Ed Andrieski)

  • Demaryius Thomas

    Denver Broncos wide receiver Demaryius Thomas is shown at the courthouse in Castle Rock, Colo., on Wednesday, Feb. 29, 2012, where he is scheduled to testify in the sexual assult trial of former Denver Broncos cornerback Perrish Cox. (AP Photo/Ed Andrieski)

  • Perrish Cox

    Former Denver Broncos cornerback Perrish Cox, left, arrives at district court with his attorney Harvey Steinberg= where Cox is on trial in Castle Rock, Colo., on Wednesday, Feb. 29, 2012. Cox has pleaded not guilty to one count of sexual assault while the victim was physically helpless and one count of sexual assault while the victim was incapable of determining the nature of the conduct. He faces two years to life in prison if convicted. (AP Photo/Ed Andrieski)

  • Perrish Cox

    Former Denver Broncos cornerback Perrish Cox arrives at the courthouse where he is on trial in Castle Rock, Colo., on Wednesday, Feb. 29, 2012. Cox has pleaded not guilty to one count of sexual assault while the victim was physically helpless and one count of sexual assault while the victim was incapable of determining the nature of the conduct. He faces two years to life in prison if convicted. (AP Photo/Ed Andrieski)

  • Perrish Cox

    Former Denver Broncos cornerback Perrish Cox arrives at the District Court in Castle Rock, Colo., Friday, Dec. 9, 2011, for a pretrial hearing. Cox, a former NFL football player, is scheduled to go on trial Feb. 27, for sexual assault. (AP Photo/Ed Andrieski)

  • Perrish Cox

    FILE - This Jan. 7, 2011, file photo showing Denver Broncos football player Perrish Cox arriving at the Douglas County Justice Center in Castle Rock, Colo. Cox is due in court Monday, May 16, 2011where he's expected to enter a plea. (AP Photo/Ed Andrieski, File)

  • Perrish Cox

    Denver Broncos football player Perrish Cox, right, and his attorney Harvey Steinberg arrive at the Douglas County Justice Center in Castle Rock, Colo., on Friday, Jan. 7, 2011, as he arrives for a hearing in connection with the sexual assault charges that are pending against him.(AP Photo/Ed Andrieski)

  • Perrish Cox

    Denver Broncos football player Perrish Cox, right, and his attorney Harvey Steinberg arrive at the Douglas County Justice Center in Castle Rock, Colo., on Friday, Jan. 7, 2011, as he arrives for a hearing in connection with the sexual assault charges that are pending against him.(AP Photo/Ed Andrieski)

  • Perrish Cox

    Denver Broncos football cornerback Perrish Cox clears security at the Douglas County Justice Center in Castle Rock, Colo., on Friday, Jan. 7, 2011, as he arrives for a hearing in connection with the sexual assault charges that are pending against him.(AP Photo/Ed Andrieski)

  • Perrish Cox

    Denver Broncos rookie cornerback Perrish Cox is seen in a photo provided Friday, Dec. 10, 2010 by the Douglas County, Colo., Sherrif's Office. Police in a south Denver suburb say Cox has been arrested for investigation of felony sexual assault. Michelle Kivela, the public information officer for the city of Lone Tree, Colo., says Cox was arrested Thursday night following an investigation into an Oct. 28 incident. The case filing has been sealed at the request of the district attorney's office. (AP Photo/Douglas County Sherrif's Office)

  • Perrish Cox

    San Diego Chargers wide receiver Malcom Floyd (80) makes a one-handed catch as he dives for the ball in the second quarter of an NFL football game against the Denver Broncos, Sunday, Jan. 2, 2011, in Denver. Broncos cornerback Perrish Cox (32) defends on the play. (AP Photo/ Jack Dempsey)

  • Perrish Cox

    Denver Broncos cornerback Perrish Cox (32) loses his helmet as he is and teammate Robert Ayers, left, tackle San Diego Chargers tight end Kris Wilson during the second quarter of an NFL football game on Sunday, Jan. 2, 2011, in Denver. (AP Photo/ Barry Gutierrez)

  • Perrish Cox

    Denver Broncos cornerback Perrish Cox (32) breaks up a pass intended for Baltimore Ravens wide receiver Derrick Mason, right, during the first half of an NFL football game in Baltimore, Sunday, Oct. 10, 2010. (AP Photo/Gail Burton)

  • Perrish Cox

    FILE- In this Aug. 10, 2010, file photo, Denver Broncos rookie cornerback Perrish Cox looks on during NFL football training camp at Broncos headquarters in Englewood, Colo. Police in a south Denver suburb say Cox has been arrested for investigation of felony sexual assault. Michelle Kivela, the public information officer for the city of Lone Tree, Colo., says Cox was arrested Thursday night, Dec. 9, 2010, following an investigation into an Oct. 28 incident. (AP Photo/Jack Dempsey, File)