STAMFORD, Conn. (CBSNewYork) — The former attorney for Fotis Dulos was back in a Connecticut courtroom Thursday.

Kent Mawhinney reportedly pleaded not guilty to conspiring to kill Dulos’ estranged wife, Jennifer Dulos, back in May.

READ MORE: 'Irresponsible:' MTA Says Mayor's Plan To Add 250 Subway Officers Isn't Enough To Combat Recent Crime

TIMELINE: The Investigation Into Missing Mother Jennifer Dulos

READ MORE: With Injuries Piling Up Across New York City, Mayor De Blasio Is Considering Bicycles Being Required To Have License Plates

Mawhinney was arrested in January along with Dulos’ then-girlfriend Michelle Troconis.

An arrest warrant alleges Mawhinney lied about contacts he had with Jennifer Dulos on the day she disappeared. She has not been found.

MORE NEWS: Bronx Man Takes It Upon Himself To Clean Up NYC Park, But City Says Not So Fast

Fotis Dulos took his own life last month. Prosecutors believe Fotis Dulos killed Jennifer Dulos, who was the mother of their five children.