I was wondering how long before someone raised this. Outrage over the latest killing of a police officer has caused both the family of the slain officer and even one of the city’s liberal lawmakers to question whether limits on stop-and-frisk have emboldened criminals to declare war on cops. “I think Mayor [Bill] de Blasio should reconsider this stop-and-frisk because I think it’s gonna be a deterrent to these thugs who go around taking innocent people’s lives,” Princess Holder, the grieving mother of Officer Randolph Holder, told FOX5NY Wednesday. Brooklyn state Assemblyman William Colton, a Democrat who receives backing from the Working Families Party, also questioned the curtailment of stop-and-frisk, saying he was reconsidering his stance on the issue. “Since the latest restrictions on stop-and-frisk by the city administration and the courts, the rate of police-officer deaths by gunfire went up significantly,” Colton said. “This shows that respect for police authority is fading and criminals are getting more brazen. “We need city leaders to step up and establish strong policies to remove guns from the hands of criminals — not to strip police officers of authority and undermine community respect for professional police activities,” added Colton. His comments came hours after the shooting death of Holder, allegedly by a suspect with a long rap sheet. Holder is the fourth cop killed in the line of duty since December, along with Brian Moore, Rafael Ramos and Wenjian Liu. Colton said he will be distributing blue ribbons at his 155 Kings Highway office in support of the NYPD. Colton also said criminals’ easy access to illegal guns is a pressing national problem that must be addressed by Congress.