On 10 July 1986 Hammar murdered Antti Johannes Eljaala, a 44-year-old businessman from Tampere, onboard the ship Viking Sally on its voyage from Turku, Finland to Stockholm, Sweden.
As Eljaala was leaving the cabin, Hammar had struck him on the neck with a knife and strangled him with a piece of cloth he had torn from the bedcovers.
In Lapland the escapees got into an argument ending in Hammar killing Tenhunen by hitting him on the head with an axe.
The escape ended in August 1988 when Hammar and Orajärvi got caught in Stockholm and were returned to Finland.
[5][6] On 7 December 2011 the Helsinki district court sentenced Hammar to four years in prison for attempted manslaughter and to pay compensation to the victim.