The 33-year-old was last seen leaving his home on the morning of 8 January – just hours before his smouldering car was found near a secluded bay on Guernsey’s south coast.
Bone fragments and a shotgun were also found inside the vehicle.
Yesterday, Guernsey police confirmed that a forensic examination had found that the bones were from the missing man.
However, it is still not known how Mr Alps died. Further tests are due to be carried out and a handwriting expert is continuing to analyse a letter purporting to be from Mr Alps which was handed to officers in the days after he disappeared.
The force said they are keeping ‘an open mind in relation to the investigation’ which has attracted international media attention after it as revealed that Mr Alps was running a campaign to support the war effort against Russian forces in Ukraine.
In a statement, Guernsey’s police chief Patrick Rice said: ‘Family liaison officers continue to support Mr Alps’ mother during this difficult time.
‘The cause of death has not yet been determined and the pathologist from the Home Office intends to carry out further tests in the UK within the next week, subject to availability.’
He added: ‘The letter purporting to be from Mr Alps, which was sombre and reflective in content, was sent to the UK on Thursday for analysis from a handwriting expert.
‘The result of this analysis is likely to take several weeks. Officers continue to have an open mind in relation to this investigation, although I would again repeat that at this stage there is no evidence linking Mr Alps’ activity in Ukraine with his car being found burnt-out in Guernsey.’