Canadian embassy officials examined the residence of the 53-year-old murdered Canadian Tamil, reported the Jaffna daily newspaper, Uthayan.
Anthonypillai Mahendrasa was found dead with a slit across his throat near Paranthan Junction in the Kilinochchi district of Vanni, last week.
According to the post mortem report he had fallen to the ground and had been struggling before he died.
Local people said they had seen unidentified men wearing balaclavas during the time of his death.
Mahendrarasa was reportedly visiting the area to reaffirm his ownership of land he owns in the Kumarapuram - currently occupied by the Sri Lankan military.