A couple missing for 11 days in the UK with their newborn have a substantial amount of cash, allowing them to live off-grid, police have said.
Constance Marten, Mark Gordon and their baby have no luggage with them after most of their belongings were destroyed in a car fire, and are using cash to pay for taxis and places to stay.
Ms Marten comes from a wealthy aristocratic family, while Mr Gordon is a sex offender who served 20 years in US jail for rape and battery.
Police are worried for the newborn and say neither Ms Marten nor the baby have had medical attention since the birth.
The couple are understood to have lived an isolated life since meeting in 2016, with then-drama student Ms Marten cutting off ties with family and friends.
Last September, they began moving around the UK, renting AirBnBs for brief periods.
On 5 January, they were on the M61 when their car broke down and caught fire near junction four at Farnworth, Bolton.
The couple then walked to Anchor Lane Bridge, where they got a taxi to Liverpool, northwest England, before getting another to Harwich, Essex, southeast England.
They were seen around Colchester on Friday and Saturday 6-7 January, when they took another taxi to East Ham Station in Newham, London, and were last seen.
Each time Ms Marten and Mr Gordon are seen on CCTV, they are covering their faces or looking away, and have kept the baby covered up.
Investigators say the couple appear to know how to evade authorities, which is making the search for them harder.
Police believe they could be anywhere in the UK and are appealing to the public to come forward with any information that may help find them.
Some 200 officers are working on the search and have scoured through more than 200 hours of CCTV footage since the pair were last seen on 7 January.
Mr Gordon's conviction relates to a Florida attack on a woman in her early 20s when he was 14.
