The grieving family is searching for answers. They've come together to plan a funeral for the 58-year-old woman.
"My sister was a wonderful sister. Very beautiful of heart," said Rosemarie Desravines.
Pierre-Louis grew up in Haiti. She worked as a home nurse. Seven days a week, she visited her elderly patients.
Around 9:30 yesterday morning, she was on her way to meet the bus. She was hit by a large red container truck at Cheltenham and Bustleton.
Witnesses said the driver casually drove away from the intersection. Police believe he or she may not have known what had just happened.
Pierre-Louis was pronounced dead at the scene.
"I don't understand. How can you hit somebody? She is 5'5". How come you don't see her?" she wondered.
"It's not easy to go through all this. She's going to be very, very missed. She was special to all of us," said Kathiana Desravines, the victim's niece.
Police stopped similar container trucks in the hours after the accident, but so far they have not found the driver or the truck involved.
Police are looking for a large truck that transports dumpsters. The cab was red. The dumpster on the back was blue. There are apparently many trucks just like that in Philadelphia.
The Pierre-Louis family hopes someone with information hears their plea and comes forward.
