ALBANY – A new trial has been ordered for a man serving life without parole for stabbing a couple to death because an appellate court found he was improperly interrogated without counsel, and his statements were impermissibly introduced at trial.

A unanimous panel of the Appellate Division, Third Department, acknowledged that there was substantial evidence of the guilt of Edward A. Dashnaw but said that “we are constrained to find that a reasonable possibility exists that these numerous and constitutional errors” might have contributed to his conviction.