PERJURY: Dairne Olwen Cassidy was the second police officer to be sentenced for perjury that relates to a car crash on Earnscleugh Road, Alexandra.

A former Alexandra police officer was sentenced to seven months' home detention in the Alexandra District Court today after she was found guilty of perverting the course of justice.

Dairne Olwen Cassidy, 39, was the second police officer to be sentenced for perjury that relates to a car crash on Earnscleugh Road, Alexandra, in 2005 that involved former Alexandra senior constable Neil Ford.

Cassidy was found guilty of hiding vital information taken at the time of the crash.

She admitted taking a statement from Ford then after seeing a contrasting statement from him four days later she claimed to have lost her notebook.

The crash was then blamed on 17-year-old Shane Cribb, now 22, who was charged with careless driving causing injury, fined $600 and was disqualified from driving for six months.

Mr Cribb was driving his girlfriend's Honda Civic and at the time of the crash and when her father, Steve Potter, arrived at the scene he said it was evident the crash was not caused by Mr Cribb.

Mr Potter fought for five years to have the teenager's named cleared and after two witnesses came forward following Mr Cribb's conviction he was given a retrial and police offered no evidence.

His conviction was quashed and was awarded almost $18,000 in costs.

Ford was sentenced to two years and four months' jail on September 28 after he was found guilty of perjury after he lied under oath.