Madeline Cosme told News 12 Connecticut a burgundy sedan was seen speeding away from Greg Ingram's house on Seaview Avenue early Saturday morning.
Police say the 33-year-old was fatally shot through a window after going to check a noise on his back porch. Cosme says her fiancée had no enemies.
"He was a real special guy and he cared about his family and his kids and if anybody knows anything, if they could just come forward please," Cosme pleaded.
Police asking anyone who can help with their investigation to call (203) 576-TIPS.