Ukrainian Iryna Zarutska came to the U.S. to escape war but was stabbed to death in Charlotte on Friday.  (Evgeniya Rush/GoFundMe)

While police statistics show major crimes, including homicides, are on the decline, Kenniff said they don’t paint a full picture.

“The only statistic that should matter is how many preventable, otherwise preventable crimes are occurring,” he told Fox News Digital.

Kenniff noted that even Brown’s family wanted him off the streets before the stabbing.

“From what I’ve read, his own mother tried to commit him involuntarily and had a judge, whose job it is to uphold the law and collateral to that obviously protect the public, release that person on a note that they’ll come back to court,” he told Fox News Digital. “And [to] not look at that as a man-made preventable crime — that did not need to occur.”

Stabbing victim Iryna Zarutsk fled Ukraine for the US. (@lucaveros225/Instagram)

Brown faces first-degree murder in North Carolina as well as a federal charge of committing an act causing death on a mass transportation system.

U.S. Attorney General Pam Bondi said Tuesday that the Justice Department will seek the maximum penalty for Brown, saying that the Aug. 22 attack was a “direct result of failed soft-on-crime policies that put criminals before innocent people.”

“We will seek the maximum penalty for this unforgivable act of violence,” she said. “He will never again see the light of day as a free man.”

Republican lawmakers in North Carolina have also proposed a bill to change how judges set bail and bond, according to the Charlotte News & Observer newspaper.

The proposed bill, Iryna’s Law, would make it harder for people accused of violent crimes to get pretrial release and imposes stricter conditions on them if they make bond. It would also expand the state’s authority to have mentally ill people forcibly committed.

Fox News’ Sarah Rumpf-Whitten contributed to this report.