A £50,000 reward is being offered to help solve the murder of a young mother stabbed to death and set alight in her own home 12 years ago.
Karen Hales was 21 when she was killed in front of her 18-month-old daughter in Ipswich, on 21 November 1993.
Her death started one of the biggest murder hunts in Suffolk Police history but no-one has been brought to justice.
Suffolk Police, a local newspaper and several business people raised the cash reward in a bid to find her killer.
Mystery remains unsolved
A police spokeswoman said the reward would be paid to anyone who came forward with a vital piece of information leading to the conviction of the person responsible.
Ms Hales, a former shop assistant, was last seen alive at 1550 BST on the day she was killed.
That was the time that her partner Peter Ruffles left their home in Lavenham Road for work at the Constantine Road bus depot in Ipswich.
Despite 1,400 lines of inquiry, and an appeal on the BBC Crimewatch UK programme, Ms Hales's murder remains unsolved.
Det Supt Roy Lambert said: "We are extremely grateful for the generous reward offer and hope that this will lead to us receiving that one call which could help us solve this murder inquiry.
"We do not close unsolved investigations in Suffolk. We will continue to investigate any new leads that are presented to us.
"I would urge anyone who has any information about this incident to come forward."