A NSW court has deplored the "cold-blooded determination" of a young man who killed his father with a samurai-sword after first wounding the man in a botched attempted on his life two months earlier.
Michael Phillip Martin was jailed on Friday for at least 27 years and nine months for murdering his father, Michael Anthony Martin, 46, at a flat in northern NSW in 2014.
"The moral delinquency involved in this course of conduct is staggering," Justice Peter Hammill said as he jailed the 28-year-old in the NSW Supreme Court in Lismore.
The father, an alcoholic and drug user for many years, neglected his son, and they were estranged for many years because of the highly dysfunctional relationship.
In late 2013, the son re-established contact and in February 2014 took out $2.5 million insurance policies over his father's life.
The son concocted an alibi before attacking his sleeping father and the father's roommate in April, but the men survived.
The son visited his father in hospital and, after his release, visited his injured dad at home under the pretext of cleaning up the blood-stained flat on June 12 that year.
At some point he attacked his father with a sword, leaving him with multiple penetrating injures - including one through the heart.
The son staged the scene in such a way that he could assert he also was a victim of a home invasion in which a number of assailants attacked him and his father.
He was given a maximum term of 37 years.