Authorities are investigating a fatal car crash in north Harris County.HOUSTON, Texas (KTRK) -- Authorities are investigating a fatal car crash in Aldine Westfield at Greens Road in north Harris County.Police believe the vehicle failed to stay in a single lane and then crashed into a tree. A man and woman were both pronounced dead on scene.Investigation for the cause of this crash is underway.Follow Charly Edsitty on Facebook and Twitter. Report a correction or typo