Police have located and spoken to a key witness to a double-fatal crash in South Canterbury on Boxing Day.
The woman was located through the assistance of the public, after police appealed for help yesterday.
The two-car crash happened around 8.35am on the Waimate Highway at Glenavy in South Canterbury on Tuesday December 26, 2017.
Horton James Hill, 80, of Christchurch and 31-year-old Matthew James Gilchrist of Oamaru died at the scene of the crash between Carrolls and Stangers Rds.
Police said they had received information from another witness that a female driver of a red car was also at the crash scene, but left before emergency services arrived.