Officer Arnulfo Crispin, 25, was shot while on patrol near Crystal Grove Drive in Lakeland, Florida, on the night of December 18, 2011. He had approached a group in a closed park and was searching one individual for weapons when another person in the group shot him from behind. The bullet struck his head; he underwent several hours of surgery at Lakeland Regional Medical Center but died of his injuries two days later, on December 21, 2011.

The suspect, identified as 19-year-old Kyle Williams, fled the scene and a multiagency manhunt involving twelve law enforcement agencies followed. After about ten hours Williams surrendered and was charged with first-degree murder. The trial included emotional testimony and forensic evidence; on August 21, 2013, Williams was found guilty and received life without parole. Officer Crispin had 18 months with the Lakeland Police Department and was remembered for his dedication to public service.

If anyone witnessed the events at Crystal Grove Drive on December 18, 2011, or has information that has not been shared, please come forward.