DOVER, Del. (AP) -- Delaware prosecutors said Thursday that they will not file criminal charges against NASCAR driver Kurt Busch following allegations of domestic violence against his ex-girlfriend.
NASCAR officials indefinitely suspended Busch last month after a Delaware Family Court judge said the former champion almost surely choked and beat Patricia Driscoll inside his motorhome at Dover International Speedway last fall.
But the Delaware attorney general's office said Thursday that there was not enough evidence to bring criminal charges.
"After a thorough consideration of all of the available information about the case, it is determined that the admissible evidence and available witnesses would likely be insufficient to meet the burden of establishing beyond a reasonable doubt that Mr. Busch committed a crime during the September 26th incident," the attorney general's office said in a prepared statement.
Jim Liguori, a local attorney for Busch, said the driver, known in NASCAR circles as "The Outlaw," was thankful.
"All along, he knew he was going to be exonerated," Liguori said. "The Department of Justice really did the right thing after considered review."
"She absolutely tried to destroy him in the press, or tried to," Liguori added, referring to Driscoll. "But the truth wins out, and the truth is its own defense."
Driscoll did not immediately respond to email and telephone messages seeking comment.
Driscoll said Busch assaulted her in September after she drove from her Maryland home to Dover to check on Busch after receiving a series of disturbing texts.
Busch and his attorneys have portrayed Driscoll as a scorned woman who set out to destroy Busch's career after he ended their relationship.
Driscoll said she and Busch argued in the bedroom of the motorhome before he grabbed her by the face and neck and slammed her head against a wall three times.
Driscoll filed charges in November, saying she feared the incident might affect an ongoing child custody battle with her ex-husband.
Driscoll also filed for a no-contact order in November, which was the subject of four days of hearings in December and January. The Family Court hearing featured testimony from Busch and others who said Driscoll told stories of being a covert operative for the federal government and a trained assassin.
More on AOL
Sports PotW for 3/2
Prosecutors: No charges for NASCAR driver Kurt Busch
OSAKA, JAPAN - FEBRUARY 28: General view of action during day two of the ISU World Junior Short Track Speed Skating Championships at Osaka Pool on February 28, 2015 in Osaka, Japan. (Photo by Tom Dulat - ISU/ISU via Getty Images)
VANCOUVER, BC - MARCH 1: Eddie Lack #31 of the Vancouver Canucks makes a shootout save on T.J. Oshie #74 of the St. Louis Blues during their NHL game at Rogers Arena March 1, 2015 in Vancouver, British Columbia, Canada. Vancouver won 6-5 in a shootout. (Photo by Jeff Vinnick/NHLI via Getty Images)
LOS ANGELES, CA - FEBRUARY 28: (Top) Ronda Rousey grapples with Cat Zingano in their UFC women's bantamweight championship bout during the UFC 184 event at Staples Center on February 28, 2015 in Los Angeles, California. (Photo by Jeff Bottari/Zuffa LLC/Zuffa LLC via Getty Images)
LONDON, ENGLAND - MARCH 01: Romelu Lukaku of Everton jumps a tackle from Francis Coquelin of Arsenal during the Barclays Premier League match between Arsenal and Everton at Emirates Stadium on March 1, 2015 in London, England. (Photo by Paul Gilham/Getty Images)
PARK CITY, UT - MARCH 01: Yiwei Zhang of China competes during the FIS Snowboard World Cup 2015 Men's Snowboard Halfpipe Final during the U.S. Grand Prix at Park City Mountain on March 1, 2015 in Park City, Utah. (Photo by Tom Pennington/Getty Images)
CHICAGO, IL - FEBRUARY 24: Kris Versteeg #23 of the Chicago Blackhawks collides into goalie Roberto Luongo #1 of the Florida Panthers as Aleksander Barkov #16 skates in from the side during the NHL game at the United Center on February 24, 2015 in Chicago, Illinois. (Photo by Bill Smith/NHLI via Getty Images)
FALUN, SWEDEN - FEBRUARY 28: (FRANCE OUT) Jason Lamy Chappuis of France takes 1st place during the FIS Nordic World Ski Championships Men's Nordic Combined Team Sprint on February 28, 2015 in Falun, Sweden. (Photo by Stanko Gruden/Agence Zoom/Getty Images)
ANAHEIM, CA - FEBRUARY 23: Ryan Kesler #17 of the Anaheim Ducks falls to the ice during the game against the Detroit Red Wings on February 23, 2015 at Honda Center in Anaheim, California. (Photo by Debora Robinson/NHLI via Getty Images)
DORTMUND, GERMANY - FEBRUARY 28: Henrikh Mkhitaryan of Borussia Dortmund scores his teams second goal next to Atsuto Uchida of Schalke 04 during hte Bundesliga match between Borussia Dortmund and FC Schalke 04 at Signal Iduna Park on February 28, 2015 in Dortmund, Germany. (Photo by Lars Baron/Bongarts/Getty Images)
ACAPULCO, MEXICO - FEBRUARY 23: Risa Ozaki of Japan serves during a female single match between Risa Ozaki and Louisa Chirico of USA as part of Telcel Mexican Open 2015 at Mextenis Stadium on February 23, 2015 in Acapulco, Mexico. (Photo by Hector Vivas/LatinContent/Getty Images)
CHICAGO, IL - MARCH 01: DeAndre Jordan #6 of the Los Angeles Clippers is fouled by Joakim Noah #13 of the Chicago Bulls at the United Center on March 1, 2015 in Chicago, Illinois. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Jonathan Daniel/Getty Images)
MELBOURNE, AUSTRALIA - FEBRUARY 28: Joe Tomane of the Brumbies breaks through a tackle during the round three Super Rugby match between the Rebels and the Brumbies at AAMI Park on February 28, 2015 in Melbourne, Australia. (Photo by Quinn Rooney/Getty Images)
HOUSTON, TX - FEBRUARY 25: DeAndre Jordan #6 of the Los Angeles Clippers dives for the basketball in front of teammate Chris Paul #3 during their game against the Houston Rockets at the Toyota Center on February 25, 2015 in Houston, Texas. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and/or using this photograph, user is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Scott Halleran/Getty Images)
MOENCHENGLADBACH, GERMANY - FEBRUARY 26: Tony Jantschke of Borussia Moenchengladbach and Vitolo of Sevilla battle for the ball during the UEFA Europa League Round of 32 second leg match between Borussia Moenchengladbach and FC Sevilla at Borussia-Park on February 26, 2015 in Moenchengladbach, Germany. (Photo by Lars Baron/Getty Images)
LIVERPOOL, ENGLAND - MARCH 01: (THE SUN OUT, THE SUN ON SUNDAY OUT) Philippe Coutinho of Liverpool celebrates with his team mates after his goal during the Barclays Premier League match between Liverpool and Manchester City at Anfield on March 1, 2015 in Liverpool, England. (Photo by Andrew Powell/Liverpool FC via Getty Images)
LONDON, ENGLAND - MARCH 01: Manager Jose Mourinho of Chelsea lies on the pitch as Chelsea celebrate with the trophy during the Capital One Cup Final match between Chelsea and Tottenham Hotspur at Wembley Stadium on March 1, 2015 in London, England. (Photo by Clive Rose/Getty Images)