Police took two months to execute a search warrant on pedophile dance teacher Grant Davies while around 250 children continued attending his dance school, the child abuse royal commission has heard.

Detective Senior Constable Jason Madsen was on a joint agency child abuse investigation team that took over a case on Davies in March 2007, after two female students at Davies' dance school made statements detailing sexual offences.

However police did not execute a search warrant on Davies' home until May 14 that year, by which time he had gotten rid of a computer and retained a lawyer.

One student, codenamed BZP, was 15 by 2007 but had been abused over a number of years.

She had received MSN Messenger messages from Davies encouraging her to masturbate and describing a sexual dream he had had, the commission heard on Friday.

When police searched Davies' house in May 2007, they found a new computer box indicating a recent purchase of a new machine, and no evidence was recovered from a new computer.

Ultimately no case proceeded against Davies.

Detective Madsen said conducting the search warrant was delayed by the heavy workload of dealing with other cases and waiting to co-ordinate with other agencies, including the State Electronic Evidence Branch.

Detective Madsen was asked by counsel assisting the commission David Lloyd whether the delay was acceptable.

"That's what happened, due to workload," he replied.

"It probably wasn't acceptable".

Grant Davies was jailed in 2015 after pleading guilty to 47 counts of sex offences against nine students at his dance school.

The hearing continues.