Gravano reportedly was reluctant to testify because he was concerned about possible questions about payment for his book, which he wrote in collaboration with author Peter Maas.
When 25-year-old Kevin Maas hit 15 home runs in his first 42 games in 1990, that was enough for him to get touted as the future holder of the single-season homer record.
On the morning of Friday 14 December, the group toured the NIWA laboratory at Greta Point in Wellington where they were hosted by Dr Els Maas, a member of the UNESCO Natural Sciences Sub-commission.