Sen. Chris Murphy Christopher (Chris) Scott MurphyDemocratic senator calls for 'more flexible' medical supply chain to counter pandemics The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon GOP chairman to release interim report on Biden probe 'in about a week' MORE (D-Conn.) said Wednesday that he will not rest until schools and streets “are truly safe,” as he remembered the shooting at Sandy Hook Elementary School four years ago.

“No other family should have to endure the pain that too many in Sandy Hook are suffering today, and I won't rest until our schools and our streets are truly safe,” Murphy said in a statement.

The Connecticut senator, who took office a month after the Newtown shooting that killed 20 elementary school students and six adults, called the four-year anniversary “a day of crippling sadness” with “impossible unanswerable questions.”

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“I have had the honor over the past four years to become close with so many of the parents and family members of those who were lost that day,” he said. “Their strength gives me strength. But there is no power that can make the pain visited upon us four years ago fade away.”

Since entering the Senate, Murphy has been a leading member fighting for gun control. Following the Orlando nightclub shooting in June, Murphy launched a 15-hour filibuster that helped spearhead a debate and eventual House protest on gun violence.

“Our world fractured four years ago and the pieces cannot ever be reassembled the same. But we can promise to be kinder to one another, to hug our loved ones and friends a little tighter, and reach out to those who may need a helping hand,” he said in Wednesday’s statement. “And we can commit to never, ever giving up in the fight to fix our broken laws and make our country safer.”