Sgt. Frank Guinn was struck by a car and killed two days earlier while riding his bike in New Orleans East with his brother-in-law, Andrew Powell.

In the aftermath of his death, two tight-knit communities — firefighters and triathletes — joined together to offer an outpouring of emotional and financial support to his widow, Kimberly, and the couple’s 7-year-old identical triplets: Isabelle, Alyssa and Makenna.

According to police, Guinn and Powell was rear-ended by a White Chevy Cruze about 10:15 a.m. Friday in the 20000 block of Chef Menteur Highway. Guinn died instantly; Powell was taken to a hospital in serious condition. Police have interviewed the driver of the vehicle but have not arrested him.