Scott Watson's family hope a compliant over a psychologist's report will overturn the Parole Board's decision not to release him from jail.

He's currently serving a 17 year sentence for the murders of Ben Smart and Olivia Hope in 1998.

The Parole Board denied his first bid for early release last week because a psychologist's report has found he's at a high risk of re-offending.

But his father Chris Watson has lodged a complaint because the details are of another prisoner.

"We hoping that the psychologist will be censured if the first report is wrong, and the second report has built on it that more or less overturns the Parole Board decision because they had bad information."

"The Parole Board's got a garbled view of his psych report."