A former West Australian detective who unlawfully accessed and passed on information from a restricted police information system should not be jailed, his defence lawyer argues.
Carl Salvatore Casilli is charged with one count each of communicating interception warrant information to another person, unlawful use of a computer in any case, unlawfully supplied an audiovisual recording of an interview, and 14 counts of without authorisation operates a restricted access system.
The offences occurred between 2008 and 2013.
Perth Magistrates Court heard on Monday that Casilli passed the information to a female lawyer with whom he was having a personal relationship.
The state argued some incidents "went beyond doing a favour for someone" and undermined ongoing investigations.
"The offender knew quite well that not only was this conduct unethical, but plain illegal," prosecution lawyer James MacTaggart said.
He said the intercept warrant affidavit contained confidential information about a person who was not a client of the female lawyer, and such action was "grossly illegal".
Magistrate Elizabeth Woods said that offence was probably the most serious.
Defence lawyer Nick Lemmon said he accepted the intercept warrant offence was "in another category" and worthy of instant dismissal.
But other offences, such as passing on a video of an interview for the female lawyer's training purposes was an example of a less serious transgression, he said.
Mr Lemmon disputed the claim Casilli had compromised police investigations and said information had not been accessed for the purpose of benefit.
Noting the repetition of the conduct and Casilli's position of trust, he said the former detective should rather be substantially fined.
He said the offences occurred when Casilli was involved in and obsessed with the hunt for the killer of Supreme Court registrar Corryn Rayney.
He will be sentenced on July 15.
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