He said for police to do their primary job - protect the community and reduce the number of victims - information sharing about who was living in their patch was vital.
"It is quite incredible that mental health patients don't fall under the same criteria that we see for people released on bail, from prison or on probation," he told the Herald this morning.
He appreciated there were privacy issues when it came to health boards passing on information about mental health patients to other agencies.
"The fact of the matter is that we don't need to know the ins and outs. We don't need to know their particular medical issues. We just need to know they are there - as do the victims.
"It's about advising victims and reducing the risk to the public. It's one of these common sense things - our members are trying to reduce the number of victims of crime and being able to track people who might pose a risk."
Mr Shadbolt said a number of West Auckland police had raised concerns about the Lyall case.
He urged the Government to include police in notifications and would be keeping an eye on cross-agency discussions between the Ministry of Health, Police and Corrections.
"Police are already advised when people are released by Corrections I think it's a natural progression that it moves on to the people under the health sector. It is unusual that we've got such good legislation around people being released on bail and from prisons but there seems to be a loophole around people that fall under district health boards."