Mulhall, who was a camp counselor at Camp Anchor near Hempstead, was killed with fellow camp counselors Jaime Malone, 22, and her sister Paige Malone, 19, when their car lost control and struck a tree along Meadowbrook Parkway in Roosevelt.
Mulhall's funeral took place this afternoon at Our Lady of Victory Roman Catholic Church in Floral Park, and mourners remembered the Malone sisters Monday at a service at the same church.
At Tuesday's service, Mulhall's three sisters, including Justine, 20, who was the driver of the car, read verses of a poem dedicated to Michael, Newsday reported.
"Our family tree is broken and nothing seems the same," the poem read. As the end of the poem neared and the sisters' sniffles and sobs grew, they read "Michael, we love you. You were the best big brother."
The five had been carpooling to their jobs as counselors at Hempstead's Camp Anchor, a day camp for special needs' kids. State Police are still trying to determine the cause of the car crash. Alcohol has been ruled out.
Joe Lentini, the camp supervisor remembers Mulhall in the video above.