WASHINGTON, DC (CNN) - The daughter of a 77-year-old man who died of an apparent heart attack said firefighters refused to help him.
Witnesses said the fire station was across the street where Cecil Mills collapsed Saturday. Marie Mills said the on-duty firefighter refused several desperate requests to help her dad.
A firefighter standing and watching the ordeal didn't help either, she said.
"I even ran to the curb and said are you going to help me, or are you going to let my dad die?" Marie Mills said.
She said firefighters told people asking them for help that they had to call 911 before anyone could respond.
"Protocol is heartless," Marie Mills said. "It is heartless. That's how I felt."
Someone called 911 eventually, but the ambulance went to the wrong location, 26 blocks away. Cecil Mills died later that day, leaving his daughter heartbroken and DC officials outraged.
Those officials opened an investigation and are reportedly questioning 15 people, including the people who were on duty at the fire station.
CNN attempted to talk with someone at the station Thursday but was told no one who had been there when Cecil Mills collapsed was there.
Deputy Mayor Paul Quander, who oversees the fire department, said nothing should have prevented Cecil Mills being helped.
"Firefighters routinely go into danger," Quander said. "They don't wait to be called. They respond. That's what's troubling about this. This goes against what firefighting is all about."
Copyright 2014 CNN. WJLA contributed to the report. All rights reserved.