Judge Ian Carter noted in his sentencing today that the man called police in February 2018 saying he thought he had harmed his own daughter.
He made a second call and police made inquiries, but no complaint was made as he was unable to say exactly what it was he'd done.
The man was released from police custody several days later, after which he continued to abuse his daughter until December 2019, when he was arrested.
"The police had no alternative but to act as they did," Judge Ian Carter told the court.
In one instance he touched his daughter's genitals under her clothes and in another incident he put his penis against her body.
"Some of the offending involved skin-on-skin touching involving the victim, that makes the offending more serious," Judge Carter said.
"It is clear from the statement that the harm to the victim is very serious. Although I acknowledge that the full extent of the harm to the victim is not yet known."
"It's difficult to find a more serious breach of trust."
The Judge said the victim was incredibly vulnerable and that the man's other young child was also in the room for some of the offending.
Judge Ian Carter noted that the man had struggled with mental illness for a lengthy period, although these issues had possibly been exacerbated by the use of methamphetamine and cannabis.