Victorian police will carry out an internal investigation into why the wife of state Opposition Leader Daniel Andrews escaped being breathtested after a road accident this month.
A police spokesman said it was policy to breath test motorists in the three hours after a collision.
He confirmed that Mr Andrews' wife Catherine was not given a preliminary breath test and described it as "an oversight".
"Local management has notified Professional Standards Command and an investigation into the circumstances will take place," the spokesman said.
Ryan Meuleman, 15, required surgery at the Royal Children's Hospital after a collision with Mrs Andrews at Blairgowrie southeast of Melbourne in early January.
Mr Andrews and their three children were in the car at the time.
The teenager's father, Peter Meuleman, told News Ltd on Tuesday the family was upset Mr Andrews had not contacted them since to check on Ryan's welfare.
But Mr Andrews said his wife had checked on Ryan's status through both the hospital and police in the days since the accident.
"I was very conscious from the outset to make sure I did nothing whatsoever that could be seen to or could in any way influence or interfere with the Victoria Police investigation into what happened," he told reporters in Melbourne on Wednesday.
"That is why I and my wife have not sought to speak to Ryan or his family, that is after consultation with Victoria Police.
"They made it very, very clear to my wife (the investigation) should be left to them."
Morning & Afternoon Newsletter