A second man has been arrested over the disappearance of Natalia Doherty in Luton 12 years ago.
The arrest was carried out on the 66-year-old, from Luton, on Wednesday September 30, on suspicion of assisting an offender and preventing a lawful burial.
He was released on bail, due to return later this month.
The last known sighting of Natalia, 50, was on April 15, 2003 in Eastbourne, where she was living.
It is known she was going to stay with her ex-husband Gerald Doherty in the now-demolished Regents Arms pub in Hastings Street, Luton around this time.
All enquiries since have failed to show any sign she is alive.
A 71-year-old man from Port Glasgow, Scotland, was previously arrested on September 22 on suspicion of assisting an offender and preventing a lawful burial. He is also due to return on bail later this month.
Officers from the Bedfordshire, Cambridgeshire and Hertfordshire Major Crime Unit launched an investigation in January 2014 into the historic case, which has led them to believe Natalia was murdered in 2003.
A house in Icknield Way, Luton was searched as part of ongoing enquiries.
Investigators are keen to trace Natalia’s final movements and anyone who recognises her or Gerald from their time at the now-demolished pub in Hastings Street, or has any information relating to her disappearance, is asked to contact the Major Crime Unit on 101 with information.