Detectives investigating the death of a teenager whose body was found on the Queen's estate have begun a fresh search for evidence.
The 17-year-old was last seen alive in August and police believe her body had been in the field since September.
They now believe she spent the early hours of 31 August in a car park at Snettisham beach. The car park is about 30 miles from where the body was found.
A Norfolk Police spokesman said: "Searches will take place today, with specially-trained officers looking for her mobile phone and other objects which may have belonged to her."
Detective Chief Inspector Jes Fry said: "I would still ask the local communities in Wisbech and King's Lynn to think back to the August bank holiday and following week in September last year, and to get in touch if they have any information about Alisa's whereabouts during this time.
"We particularly want to hear from members of the Latvian, Lithuanian and Russian communities who may have known Alisa.
"As well as sightings of Alisa herself, I am particularly keen to try to find her black LG GM360 mobile phone, or to hear of any sightings in the King's Lynn and Wisbech area of the bottle-green P-registration Lexus GS300 that Alisa was last seen in on August 31."
Mr Fry said that investigations had established that members of the Eastern European community had used the car park for a party over the August Bank Holiday.
He said: "The last confirmed sighting of her is still getting into a car in Friar's Street, King's Lynn, just after midnight on August 31. However, our inquiries have established that she may have attended this party earlier in the evening and returned after midnight.
"We know that many members of that community from the Wisbech and King's Lynn area attended and we are working to establish precisely how many.
"We would be interested to speaking to anybody who saw her there or who was at the party and can help us establish who else was there."
Mr Fry admitted that the passage of time could mean that Miss Dmitrijeva's killer has fled the country.
He said: "That has certainly happened in other cases. It would be a complication but not one we can't overcome. If there is an individual we want to speak to, we will find a way, wherever they are."
Radio and television stations in Miss Dmitrijeva's home country have run appeals in the hope they will be seen by members of her community.
Alisa lived with her grandmother and had studied beauty at West Anglia College.
Updated at 15.44, 26 January 2012