The charge stems from a woman's accusation to Haltom City police on Aug. 20 that Washington had had sex with her 13-year-old daughter, according to a police report.
It comes just six months after Washington was charged with online harassment, court records show.
Washington surrendered Sept. 25 on a warrant issued in the sexual assault case and remained free Wednesday on a $50,000 bond. He could not be reached for comment Wednesday morning.
His attorney in the harassment case, Leon Haley Jr., was in court Wednesday morning and not immediately available to comment.
Washington was hired by the Fort Worth Fire Department in March 2012 and fired Sept. 10 for violating department policy, according to Battalion Chief Richard Harrison. Because he was still a probationary employee, he did not have the right to appeal his termination and no further details were released about his termination.
Fake Craigslist personal ad
Fort Worth police first began investigating Washington late last year after a 27-year-old woman reported to officers that she had begun receiving random text messages on her cellphone on Dec. 24 from men asking her for sex and sending her pictures of their penises.
The men told the woman they were contacting her because of her Craigslist ad, according to an arrest warrant affidavit in the harassment case.
"She told them she did not place an ad and told them to not call her anymore," states the affidavit, written by Fort Worth police Detective J.D. Brady.
The ad had read "Need some men to keep my body warm during the HOlidays!!" and included four pictures of the woman dressed in lingerie. It listed the woman's phone number and identified her by her real first name but a fake last name, according to the affidavit.
By subpoenaing records, Brady learned that the ad had been created by an IP address registered to Washington and his then Fort Worth home.
The woman told investigators she and Washington had exchanged text messages in November and that she had sent him the photographs used in the Craigslist ad. She said she ended her relationship with Washington the next month prior to the ad being placed and never gave him permission to post the photographs on a dating site.
Washington initially agreed to speak with investigators but later canceled the meeting on the advice of his attorney, the affidavit states.
His wife voluntarily met with police and provided a statement that only she, her husband, and their young child lived at the home where the ad was apparently posted. She told police that she did not know the alleged victim and that she did not post the ad, the affidavit states.
Washington, who records indicate now lives in Haltom City, surrendered on the harassment warrant at the Tarrant County Jail in April and was immediately released after posting a $2,000 bond.
He was formally charged April 11 with online harassment, a Class A misdemeanor punishable by up to a year in jail and a $4,000 fine, court records show.
Washington has also worked as a model, according to his profile on Model Mayhem.
Written by Fort Worth Star-Telegram