>> A GROWING MEMORIAL NOW SITS WHERE A SAN FRANCISCO BUS SHELTER ONCE STOOD, A TRIBUTE TO THE VICTIMS OF A TERRIBLE CRASH. TONIGHT, WE'RE LEARNING MORE ABOUT THE COLLISION THAT HAS NOW CLAIMED THE LIVES OF THREE PEOPLE, INCLUDING A SMALL CHILD. THANK YOU FOR JOINING US. I'M J.R. STONE. POLICE SAY A FOURTH FAMILY MEMBER, ANOTHER CHILD IS STILL IN CRITICAL CONDITION TONIGHT. THE CRASH HAPPENED SATURDAY WHEN THE DRIVER OF AN SUV SLAMMED INTO A BUS SHELTER ON YULO STREET. ABC NEWS REPORTER CORNELL BERNARD SPOKE WITH FAMILY FRIENDS WHO SAY THE VICTIMS WERE ALL RELATED. >> I WANT AN OUTPOURING OF GRIEF IN SAN FRANCISCO'S WEST PORTAL NEIGHBORHOOD, WHERE A MUNI BUS SHELTER ONCE STOOD. ANNA AND HER FRIENDS, OVERCOME WITH EMOTION AS THEY LEFT FLOWERS AT THE SCENE FOR PEOPLE THEY KNEW. >> WE WERE FRIENDS FROM SAN FRANCISCO. REALLY CLOSE FRIENDS. LIKE VERY GOOD PEOPLE. LIKE VERY FULL OF LIFE. >> SHE'S PORTUGUESE AND THEN HE'S BRAZILIAN. LIKE THEY'RE LIVING HERE. >> FAMILY, FRIENDS SAY THE COUPLE AND THEIR TWO KIDS, A TODDLER AND A BABY, WERE WAITING AT THE BUS STOP SATURDAY FOR A TRIP TO THE ZOO WHEN THE DRIVER OF AN SUV CRASHED INTO THEM. ROSARIO FALERO SAYS THE FATHER AND TODDLER WERE KILLED. THE SFPD CONFIRMS A WOMAN DIED FROM HER INJURIES ON SUNDAY. ROSARIO SAYS SHE WAS WIFE AND MOM. >> A LOT OF THINGS THAT WE KNEW ABOUT, LIKE LOVE, WAS THEN, YOU KNOW, LIKE THEY WERE LIKE AMAZING COUPLE, LIKE THEY HAD, LIKE, NO ISSUES WITH ANYTHING. THEY WERE JUST LIKE LOVE, LOVE, LOVE AND TAKING CARE OF THEIR, THEIR KIDS, YOU KNOW, LIKE THEN THEY WERE LIKE GOING TO THE ZOO, YOU KNOW, LIKE TO HAVE A NICE DAY AT THE PARK. >> POLICE SAY THE BABY SURVIVED THE CRASH, LISTED IN CRITICAL CONDITION SUNDAY. VILMA FRANCO BROUGHT HER DAUGHTER TO THE GROWING MEMORIAL FOR THE VICTIMS. HER HUSBAND WITNESSED THE CRASH AND TRIED TO HELP. >> OBVIOUSLY, I HAVE MY CHILD, I HAVE A KID, AND I. I DON'T WANT TO IMAGINE WHAT THE FAMILY FEEL IN THIS MOMENT. HOW HEARTBROKEN IS FOR ALL THE COMMUNITY. >> IT'S DEVASTATING. >> JODY MEDEIROS FROM WALK SAN FRANCISCO, A NONPROFIT ADVOCATING PEDESTRIAN SAFETY, IS HEARTBROKEN BY THE CRASH. HER GROUP PLANNING A VIGIL HERE MONDAY AFTERNOON. >> NOBODY SHOULD DIE THIS WAY. WE SHOULDN'T. OUR COMMUNITY SHOULDN'T BE LOSING MEMBERS OF OUR COMMUNITY THIS WAY. UH- IT'S ABSOLUTELY DEVASTATING. >> MEDEIROS POINTS TO VISION ZERO SAN FRANCISCO'S GOAL TO ELIMINATE TRAFFIC RELATED DEATHS AND INJURIES. >> THAT WE'RE NOT THERE MEANS WE NEED TO BE DOING MORE. THE CITY NEEDS TO BE DOING BETTER. >> OUR GOAL IS TO MAKE SURE THAT WE'RE DOING EVERYTHING WE CAN TO ENSURE THE SAFETY OF THE PEOPLE IN THIS CITY, AND IT MAY MEAN CHANGES, BUT WE WOULD NEED TO WAIT UNTIL THE INVESTIGATION IS COMPLETE. >> INVESTIGATORS STILL DON'T KNOW WHY THE DRIVER CRASHED INTO THE BUS SHELTER. >> WE DON'T KNOW IF THE DRIVER HAD A MEDICAL EMERGENCY. THAT IS ALL UNDER INVESTIGATION. >> THAT DRIVER IS STILL IN THE HOSPITAL WHILE A C