The driver was identified as Reese Pompey. Police say he displayed several signs of intoxication.
The deputy was on traffic stop on Beltway 8 near TC Jester at 1 a.m. Sunday.
The Harris County DA's office says his vehicle was hit from behind by another car. The officer suffered head, neck and back injuries in the accident. He was taken to the hospital, but was released Sunday morning.
After the initial accident, the deputy also hit the vehicle he stopped for the traffic violation.
Our Deputy who was struck this morning by a suspected drunk driver in the 1800 block of the N. Sam. Houston Pwy has been released from the hospital. #Godisgreat— Mark Herman, Harris County Constable Precinct 4 (@Pct4Constable) June 16, 2019
The suspected drunk driver is still in hospital and will be going to jail when released. pic.twitter.com/1dJ7bYHYUb
Pompey was also taken to the hospital. He is charged with intoxication assault of a peace officer.
Deputies say blood tests showed his alcohol content to be over three times the legal limit.
Pompey was arrested in 2016 for DWI in which he had an alcohol concentration level of at least 0.15. He served 30 days in the Harris County Jail.
Authorities say there have been close to 7,000 DWI incidents this year in Harris County alone.
Drunk driving crashes reaching epidemic levels in Houston area