A REPLICA staircase in the Singh family home was built by Brisbane police to test Max Sica's feet.
Mr Sica is accused of killing Neelma Singh, 24, and her siblings Kunal, 18, and Sidhi, 12.
The Courier Mail reported a foot imprint was found in bleach at murder scene
The Supreme Court in Brisbane watched a video of police interviews and tests. On Thursday, the jury watched podiatrist Sara Jones examine Mr Sica's feet. The accused was also examined by Canadian podiatrist Robert Kennedy.
The report said Mr Sica was asked to wear various pairs of socks, walk on the floor and up and down replica stairs at the Petrie police station.
Mr Sica found the bodies of the Singh siblings in a spa at their Bridgeman Downs home on April 22, 2003.
However, the police believe the siblings were killed late on Easter Sunday night or early on Monday morning.
Mr Sica earlier told police he did not leave his home at Stafford, in Brisbane's north, from Sunday night until Monday morning when he picked up his children from their mother's house.
The trial is continuing.