An estimated 8,000 people gathered to remember the victims at the Thursday night vigil. Some sobbed openly as the names of the 17 people killed were read aloud.
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MORE: These are the Florida school shooting victims
These are the Florida school shooting victims
Some people brought candles and flowers while others held signs calling for action against school violence and gun control.
Broward County Sheriff Scott Israel was one of those demanding change. While speaking to the crowd, he said elected officials have no choice but to introduce common sense gun laws.
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"If you are an elected official and you want to keep things the way they are and not do things differently, if you want to keep the gun laws as they are now, you will not get re-elected in Broward County," the sheriff said to an applauding crowd.
MORE: Timeline of how Florida high school shooting unfolded
Florida sheriff gives timeline of events in school shooting
Florida Sens. Marco Rubio and Bill Nelson plan to visit Parkland on Friday to meet with officials. President Donald Trump has said he also plans to visit at some point. He's traveling to his Mar-a-Lago resort in Florida this weekend.
The suspected gunman, 19-year-old Nikolas Cruz, has confessed to the killings, according to a court affidavit. Authorities have not released a motive.
As of Friday morning, the official GoFundMe page for victims of the shooting had already raised more than $800,000. More than $500,000 of that was collected in just nine hours.
If you want to make a donation, visit https://www.gofundme.com/stonemandouglasvictimsfund.
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The first funeral was held Friday for a victim of the shooting. Mourners packed the Star of David chapel to remember 14-year-old Alyssa Alhadeff. The star soccer player was remembered as having a strong personality and as a creative writer with a memorable smile.
PHOTOS: Florida school shooting aftermath
The Associated Press contributed to this report.