A Department of Public Safety trooper stopped McGarry, 56, who was driving a 2007 Porsche, after she failed to signal a lane change on the Dallas North Tollway.
The KXAS anchor reportedly had bloodshot eyes, swayed and “used a loud tone of voice when talking,” a DPS report said.
She also failed several field sobriety tests including the “walk and turn,” the “one-leg stand,” and reciting the alphabet backwards after she was pulled over at 1:30 a.m.
McGarry admitted to drinking three glasses of wine but allegedly refused a breathalyzer test. A mandatory blood sample was then taken.
The NBC 5 anchor had no previous DWI arrests, and she has no previous convictions, according to the Dallas County Sheriff’s Department.
She has been with KXAS-TV since 1992, according to the station’s official website.
“NBC 5 station management is looking into the matter this evening and has no further comment,” Brian Hocker, vice president of programming for KXAS-TV, said Sunday.