A federal judge in New York has defended a non-guideline prison sentence for a former business executive convicted of conspiracy and securities fraud, saying to rule otherwise would be a “travesty of justice.”

In May, Southern District Judge Jed S. Rakoff sentenced Richard P. Adelson, the former president of cancer diagnosis company Impath Inc., to 42 months in prison, rather than 85 years as federal prosecutors had suggested in papers. He also ordered $50 million in restitution.