Charlie Kirk's widow, Erika Kirk, has vowed to continue her husband's mission after he was shot and killed at an event in Utah, with police arresting 22-year-old Tyler Robinson for the murder."If you thought my husband's mission was powerful before, you have no idea, you just have no idea what you have unleashed across this entire country," Erika Kirk said. Vigils were held across the country last night in honor of the late conservative activist. The FBI has been searching Robinson's home for evidence and clues. Investigators say Robinson fired a single round from a bolt-action rifle, leaving behind the weapon and bullet casings engraved with messages like, "Hey fascist, catch." Authorities say Robinson had grown increasingly political in recent years, telling family members he knew Kirk would be on the Utah Valley University campus and criticizing the conservative activist.Police say it was Robinson's father who recognized his son as the suspect after the FBI released photos. He encouraged Robinson to turn himself in. Utah Gov. Spencer Cox said, "A family member of Tyler Robinson reached out to a family friend who contacted the Washington County Sheriff's Office with information that Robinson had confessed to them or implied that he had committed the incident."Robinson is due in court Tuesday on murder charges. Both President Trump and Utah's governor have expressed their desire for prosecutors to pursue the death penalty.Voter registration records show that Robinson is registered to vote unaffiliated with any party, although he is listed as an "inactive" voter, meaning he hasn't voted in at least the most recent two general elections.Kentucky Rep. James Comer said people feel safer now that the suspect is in custody, but there are still concerns from lawmakers about the rise of political violence. Some lawmakers have changed or canceled their political events. Lawmakers on both sides of the aisle are calling for calmer rhetoric and more security, something that is being considered on Capitol Hill.