Israel said Thursday that Deputy Scot Peterson was suspended without pay and subsequently made a decision to resign and file for retirement.
When asked if officers will carry AR-15's, Israel said some would.
Israel said he chose to suspend Peterson after viewing a video that showed the deputy's actions during the rampage that killed 17 people.
Israel said Peterson was on campus during the shooting and took up a position, but he did not enter the freshman building when the shooting was taking place.
"Went in. Addressed the killer".
Meanwhile, The Empire State Building will go dark on Wednesday night to honour the victims of last week¿s deadly shooting at a Florida high school.
CNN was attempting to reach Peterson for comment.
"I'm devastated, sick to my stomach, there are no words", Israel said.
Authorities have said that Cruz, who was expelled from Stoneman Douglas High previous year for unspecified disciplinary problems, made his getaway moments after the shooting by blending in with students fleeing the school for safety.
Coral Springs Police Chief Tony Pustizzi said he has been asking for five years and even unsuccessfully offered to have his agency pay for safes to store the guns. He insisted that the mishap did not put any lives in danger.
WTVJ reports Israel said he spoke with the Broward Schools Superintendent who supports the idea.
After the death of the 14 students and three adults, Israel said he believed law makers needed to enact "common sense" gun laws and said he had a conversation about it with Gov. Rick Scott.
The sheriff's office also said it had multiple calls to the department about the shooting suspect, and two other Broward sheriff's deputies are under investigation into whether they could have done more to prevent the Valentine's Day shooting.
After the incident, many lawmakers, gun control advocates and student survivors of the Florida school shooting have urged the Trump administration to implement tougher gun measures.
"This would be obviously only for people who were very adept at handling a gun, and it would be, it's called concealed carry, where a teacher would have a concealed gun on them. They're not fully automatic".