Confessed details caused great heartache to the family of Cheryl Grimmer, who went missing in 1970. Photo: Bianca De Marchi, Nsw Police/AAP PHOTOS

Revealing the name and confession of a man who admitted killing a three-year-old more than five decades ago has been a hard choice for a grieving family.

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Under privilege in the NSW parliament and with the blessing of Cheryl Grimmer's family, MP Jeremy Buckingham identified the suspect known by the pseudonym "Mercury" and read out his confession to police in 1971.

Mercury was accused of abducting and murdering Cheryl while she enjoyed a d

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