Andrew Griggs, 56, murdered Debbie Griggs in 1999 and has never revealed the location of her body.
On Wednesday 30 October 2019 he was jailed for a minimum term of 20 years, two days after a jury at the same court found him guilty of her murder.
The trial, which ran for five weeks, heard that in May 1999 Andrew Griggs told Kent Police Debbie, who was 34, had gone missing following a series of arguments.
As part of the investigation into her whereabouts it was established that her white Peugeot 309 had been parked in a residential street about a mile away from their home in Deal.
The inner lining of the boot was missing and a small trace of Debbie’s blood was found inside.
Witnesses later reported having seen the vehicle leave the Griggs’ home address at two different points in the early hours of Thursday 6 May.
Andrew was arrested on suspicion of her murder on 24 May 1999 but the CPS ruled there was insufficient evidence to support a prosecution.
He moved to Dorset in 2001 but the case remained open and further enquiries, searches and excavations were carried out in the years that followed.
The evidence was re-submitted to the CPS in 2018 who authorised a charge of murder against Andrew Griggs.
He has been held on remand since being taken into custody from his home in Ringwood Road, St Leonards, Dorset, on 12 March 2019.
Detective Chief Inspector Kaye Braybrook, of the Kent and Essex Serious Crime Directorate, said: ‘Debbie Griggs was a loving mother of three young sons and with a fourth child on the way. The jury heard from a number of witnesses who all agreed she would have never abandoned them, and was not the depressed, unstable and violent person Andrew Griggs has gone to great lengths to paint her as.
‘Only Andrew knows how he killed her and what he did with her body, and I appeal to him to have the courage to speak up and enable those who continue to grieve her loss to have some form of closure. It is not too late for him to do the right thing.
‘I hope Debbie’s surviving family can take some comfort from the outcome of this case, which is testament to the hard work and determination of cold case detectives who ensure justice catches up with serious criminals like Andrew Griggsregardless of the length of time that has taken.