The Chairperson of the Policing Authority has said it is concerned about the quality of the garda investigations in two out of 24 homicide cases.
However, Josephine Feehily said the deficiencies in the investigations do not appear to have impacted on the outcomes.
The classification and investigation of 41 deaths is being examined after concerns were raised by two civilian staff in An Garda Síochána.
Ms Feehily said the deficiencies were around issues such as delays in taking witness statements, protecting the chain of evidence and not recording reasons for decisions.
On RTÉ’s News at One, she said that "when there is not a recorded reason for a decision then you have to find out what the reason might have been so you can make an assessment".
But Ms Feehily said the Authority is "very happy with the thoroughness which gardaí are approaching the review (of the 41 cases) and we are satisfied the deficiencies we have found have not impacted on the outcome".
She also said gardaí are coping with seriously out of date technology.
Ms Feehily agreed with the Garda Inspectorate report last month which said An Garda Síochána is well behind other comparable police services in how it allocates resources and how it uses technology and data to manage demand and improve its service to the public.
She said there are uneven deployments, for historical reasons, around the country that have not taken account of population shifts or of new crime types.
Ms Feehily added "there is a serious piece of work to be done and Commissioner (Drew) Harris is aware of that and he’s committed to doing it around trying to identify where are the demands for garda presence rather than where there used to always be guards and they don’t give the same outcome".
Speaking as the Authority launched a report on the work it has carried out for the past year, Ms Feehily said she was also concerned about the fact that there had been two domestic homicides so far this year.
She said domestic violence was an issue the Authority would examine.
It published ten reports on garda oversight, reform and on the effectiveness of the Authority.
It also nominated Drew Harris to Government for appointment as Commissioner, the first Commissioner from outside the State.
The Commission on the Future of Policing has recommended the Authority be replaced with a new body which incorporates its work and that of the Garda Inspectorate.
The Commission's recommendations have been accepted by the Government.
Additional reporting Kate Egan
