DNA tests are to be carried out on the remains of a body recovered from the River Foyle more than 30 years ago to determine if it is that of missing teenager Gerard Slattery.
The 16-year-old disappeared in 1973 after leaving his home near Omagh to go to Mass.
A body matching his description was found a year later, but it was never positively identified and was buried in an unmarked grave in Strabane.
The remains were exhumed earlier this year and DNA tests are now due to be carried out on bone samples taken at the time to determine if the body is that of Mr Slattery.
His family are hoping to bury him in a marked grave close to where they live if a positive identification is made.