Pascal, Brigitte, Sébastien and Charlotte Troadec were killed on the night of February 16 to 17, 2017 in Orvault.
Hubert Caouissin, 50, was sentenced Wednesday evening to 30 years of criminal imprisonment.
His ex-partner, Lydie Troadec, was sentenced to three years in prison, two of which are closed.
The decision was made quickly.
Hubert Caouissin, sentenced Wednesday evening to 30 years of criminal imprisonment for the quadruple murder of his in-laws, and his ex-companion Lydie Troadec, sentenced to three years in prison, do not wish to leave for a new trial, indicated Thursday their lawyers.
"There will be no appeal," said Me Thierry Fillion, lawyer for Hubert Caouissin, 50, against whom the public prosecutor had requested life imprisonment.
At the end of two weeks of debates, the Loire-Atlantique Assize Court retained the alteration of discernment for his client, thus allowing him to benefit from a mitigation of sentence.
At the end of the hearing, the defense lawyers had spoken of "relief".
Especially since no special security sentence has been pronounced, which means that Hubert Caouissin will remain in prison for at least 15 years.
Lydie Troadec "accepts the decision"
He was on trial for having killed with hind kicks in February 2017 his brother-in-law Pascal Troadec, his wife, Brigitte Troadec, and their children, Charlotte, 18, and Sébastien, 21.
He then dismembered, eviscerated and burned the bodies of his victims to whom he blamed the theft of a hypothetical treasure of gold bars.
Lydie Troadec, 52, who appeared free, was sentenced to three years in prison, including two years, for altering a crime scene and concealing a corpse.
She incurred three firm.
Already detained for four months during the investigation, she was again imprisoned at the end of the hearing.
"She is not surprised by the decision which she accepts perfectly", explained her lawyer Me Loïc Cabioch.
The deadline for appealing at the end of this trial is ten days.
Nantes
Troadec case: Hubert Caouissin sentenced to 30 years in prison for the quadruple murder
Society
Troadec affair: "I feel guilty" ... Lydie Troadec collapses on the first day of the trial
Nantes
Troadec family
Assize Court
Murder
Justice