Commenting after the Police Investigations and Review Commissioner (PIRC) informed the Justice Committee that its resources were "stretched to the limit" and that a shortage of resources has impacted upon its work.
Scottish Liberal Democrat justice spokesperson Liam McArthur MSP said:
"Liberal Democrats have regularly asked whether PIRC has the resources it needs to get through its mountain of work. Now we learn that its investigations, which include the probes into the conduct of the Chief Constable, have been held back by a lack of resources.
"While the Scottish Government has now given it a fresh financial package, it is clear that PIRC could have done with this much earlier. The police officers and members of the public waiting for news on their cases will be disappointed to learn that the Commission's work has been hampered for the last year.
"PIRC does critical work and SNP ministers must take responsibility for the delay to these cases."