The commission heard Detective Superintendent John Kerlatec was regularly briefed about Strike Force Lantle - an investigation into the concealed sexual abuse by Maitland-Newcastle Catholic clergy.

Superintendent Kerlatec said one of the country's best sex crimes investigators Detective Inspector Paul Jacob, who is yet to given evidence, was assigned to give assistance to local detectives investigating the matter.

Earlier in the week, whistleblower Detective Chief Inspector Fox, said the Strike Force had been set up to fail by corrupt police who were not interesting in properly investigating paedophilia within the church.

"Certainly not, from everything I saw and everything I was told things were progressing very well and certainly not set up to fail ... [the investigation] had a high likelihood of succeeding," Superintendent Kerlatec said.

The commission continues.