'Our main goal at this point, absent of helping these families heal and keeping our schools safe, is making sure this killer receives and justice he deserves, ' Israel said prior to today's press conference.
"Shame on anyone who would talk about credit at a time like this", Israel said. But instead of waiting it out, Peterson chose that moment to resign and retire from his position.
Broward County has students enrolled in more than 300 schools.
Marjory Stoneman Douglas High School had one armed school resource officer on campus during the shooting, though he did not fire.
Peterson was also nominated for Parkland deputy of the year in 2017, an internal memo from the sheriff's office dated March 27, 2017, shows.
Scott Peterson resigned/retired after he was suspended without pay. I mean these families lost their children.
The sheriff said Superintendent Robert Runcie fully supports his decision.
Police officers arriving on the scene from the adjacent city of Coral Springs thought the gunman was still inside as they searched the building, based on a security camera video feed that they mistakenly believed was showing them real-time images but was actually footage from 20 minutes earlier.
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Israel said he made the decision after reviewing video surveillance and interviewing witnesses, including the deputy himself.
Students and teachers who survived a deadly high school shooting in Parkland, Florida, last week expressed opposition to arming teachers as a response to the threat of mass shootings during a CNN town hall with lawmakers Wednesday night. He remained stationed outside the building while the shooting went on.
Student Sam Zeif tearfully called for increased restrictions for buying AR-15s, the type of gun used in the shooting at his school.
The sheriff also revealed that since 2008, BSO was involved in 23 calls regarding Nikolas Cruz and his brother.
School resource officers are police officers who are responsible for safety and crime prevention in schools, the United States government says.
"Our new normal has yet to be defined, but we want to get back to it", geography teacher Ernest Rospierski said.
The announcement comes as authorities are reviewing the law-enforcement response to the worst school shooting in Florida history. "Patrol officers who quickly move to confront an active shooter face a high likelihood of being shot themselves".