He was driving to work at Maghaberry prison when the incident occurred - writes rte.ie.
Vincent Banks, aged 49, of Smithfield Gate Apartments in Dublin 7 was convicted earlier this year at the Special Criminal Court of IRA membership following the murder of Mr Black.
The Special Criminal Court heard that gardaí established a forensic link between the shooting and a Toyota Camry bought by Banks off a man in Tallaght.
Detective Inspector Anthony Lenehan, of the Special Detective Unit, said Banks signed the logbook with a false name and address but gardaí found the car registration certificate at that address in Rathgar and Banks' thumbprint was on it.
The court heard that Banks had earlier been acquitted of withholding information in relation to the murder of Mr Black and that there was no evidence he knew the car was to be used in a murder.
He will be sentenced in two weeks'time.
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