Michael James Mair, 67, leaves Maroochydore Court House after giving evidence during a trial for an alleged sexual assault.
Michael James Mair, 67, leaves Maroochydore Court House after giving evidence during a trial for an alleged sexual assault.

Accused trainer takes stand to deny sex assault claims

RACE horse trainer Michael James Mair has taken to the witness stand and repeatedly denied sexually assaulting a teenage woman.

Mair, 67, gave answers including "no", "no way" and "definitely not" in response to suggestions made by Crown Prosecutor Greg Cummings during cross-examination in Maroochydore District Court on Wednesday.

Mair has pleaded not guilty to touching a teenager on parts of her body including her breasts and inside her underwear at Little Mountain in June 2013.

His defence barrister Stephen Courtney also questioned him about the alleged incident.

"Did you engage in any sexual touching of ...?" Mr Courtney asked.

"No," Mair responded.

Mr Courtney said Mair had been in horse racing for his entire life and ran and managed a stable across the road from Corbould Park Racecourse.

He said to the jury that Mair's decision to give and call evidence didn't mean he had taken upon himself an onus to prove anything.

Jurors were told at the beginning of the trial on Monday by Judge John Robertson the onus was on the prosecution to prove beyond reasonable doubt that Mair had committed the alleged offence.

The court also heard in-depth analysis of DNA testing on a sample taken from the waistband of underpants the alleged victim was wearing.

Those underpants and her other items of clothing had been seized by police shortly after she reported the alleged incident.

A Queensland Health forensic scientist who had analysed the sample conceded the scientific community was still coming to grips with the ways DNA may be transferred from person or item to another.

In evidence given on Tuesday he had said a minimum of three people had contributed to the sample and there was no male "Y" chromosome indicator detected.

The forensic scientist said the lack of the "Y" could possibly be explained by dropout, where it failed to be detected and amplified.

He said testing of the low-level sample, without the absence of the "Y" being taken into account, indicated Mair was 93,000 times more likely to have contributed to the sample than not.

But he said someone could be 100 billion times more likely to have contributed to a sample than not and that still would not mean it was a certainty.

Another forensic scientist, called by the defence, gave evidence on Wednesday.

She believed the analysis showed a minimum of three contributors but that rose to four when Mair's DNA was included.

She said some of the minor detection readings relied on by her counterpart were so low that they were ambiguous in defining whether or not they represented a DNA match.

The trial continues on Thursday.