Kenya told investigators that she woke up on Saturday morning and walked into the living room of the couple's Georgia home when she saw Crawford standing over the girl with an erection.
She went back to sleep but continued to worry about what she had seen, according to the Ledger-Enquirer.
When Kenya took the girl back to her mother, the pre-teen said she had been asleep in the living room when Crawford came in.
She said Crawford had her perform oral sex on him before they had intercourse.
The 12-year-old was taken to the hospital, where doctors administered a rape kit to collect any DNA evidence.
Crawford was arrested and is currently being held without bond at Muscogee County Jail.
The former football star made a name for himself at Northwest Mississippi Community College, where he was named the 2015 national junior college player of the year.
Crawford then transferred to WVU, where he rushed 2,244 yards and 11 touchdowns in two seasons.
He signed on as an undrafted free agent with the Atlanta Falcons on May 1.
Crawford was released from the team roster in September after poor performances in several preseason games.
