Taoiseach Simon Harris has been asked to raise concerns about the case of tragic teenager Noah Donohoe with the British government.
Aontú leader Peadar Tóibín made the call during a Dáil debate on Tuesday.
The 14-year-old went missing during a bike trip from his home in south Belfast on June 21 2020.
His body was found in a north Belfast storm drain six days later.
A post-mortem examination found that the St Malachy’s College pupil had died as a result of drowning.
Suspicion surrounding the teenager’s death however was compounded by an application by the PSNI for Public Interest Immunity certificates.
They are issued by the British government when authorities don’t want information to enter the public domain.
Speaking in the Dail Mr Tóibín said: “There are major questions whether the British government are delivering justice and truth and fairness in their investigations into the death of Noah Donohoe and I would ask you to make representations to the British government to make sure that is actually happening.”
In response Mr Harris said he was “reluctant to talk too much about one individual case”.
“Of course I am happy to, and eager, to hear from families and hear from people who have concerns in relation to any matter in relation to how a state institution or in our role as co-guarantor of the Good Friday Agreement in relation to how they have been treated,” he added.