The investigation led officers to identifying Dewhurst, 75, as a suspect, police said.
Dewhurst faces a charge of misdemeanor assault family violence with bond set at $1,000, online records showed.
He was booked into the Dallas County Jail at 12:19 a.m. and released shortly before 5 a.m.
The Dallas Police Department’s Public Integrity Unit will continue the investigation.
Dallas police did not release the name of the woman in the incident and investigators did not describe her relationship with Dewhurst.
Dewhurst was Texas’ lieutenant governor from 2003 to 2015. He ran for U.S. Senate in 2012 but lost the race for the Republican nomination to Ted Cruz in a runoff. In 2014, he lost his bid for a fourth term as lieutenant governor in a primary runoff against Dan Patrick.
David Dewhurst arrested in Dallas for alleged family violence
By FOX 4 Staff
David Dewhurst charged with family violence assault
He was once among Texas most powerful politicians. But police in Dallas arrested former Lt. Gov. David Dewhurst for assault.
DALLAS - The man who was once among the most powerful politicians in Texas spent the night in jail in Dallas.
A woman told Dallas police she was assaulted Tuesday afternoon at a hotel near Dallas Love Field. She blamed former Lt. Gov. David Dewhurst.
Dewhurst was booked into jail on a misdemeanor family violence assault charge.
Police did not identify the woman or give any more details.
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