Judge killer suspects included roo shooter

By Margaret Scheikowski
Updated March 26 2020 - 3:13pm, first published 3:07pm
Leonard Warwick has pleaded not guilty to four murders and 20 other offences.
Leonard Warwick has pleaded not guilty to four murders and 20 other offences.

Many disgruntled Family Court litigants including a kangaroo shooter were not fully investigated by police trying to solve the 1980 murder of Justice David Opas, a Sydney trial has been told.