At the time of his arrest, Mesquito was found carrying a loaded .22 calibre revolver for which he was charged with nine weapons-related offenses. Later that summer Mesquito's family were evicted by TCHC for a lease violation, possibly stemming from these charges. In the search for gunmen, police executed a series of vehicle inspections, checks on parolees, and search warrants in the week of 29 July – 4 August, during the course of which over twenty firearms and hundreds of rounds of ammunition were seized. There were concerns about violence during the 4 August Caribana parade, which attracts one million people, and which had been the site of a fatal shooting in 2011. Initial reports from the shooting came via Twitter posts from witnesses and victims. Within hours of the shooting, Twitter was flooded with posts referencing "Ledda" in connection with 14-year-old victim Shyanne Charles, warning that Ledda would seek out those responsible for the violence. "This is just the beginning. Touched the wrong people," read another message. Police also looked into whether a rap video posted two days before the shooting may have been related. As part of the investigation, police went through thousands of text messages and intercepted phone calls to rebuild the sequence of events. Among these messages were several in which Mesquito claimed responsibility for the shooting. Police were met with silence in many areas as they asked for witnesses to come forward, receiving few tips despite so many people having been witnesses to, or victims of, the events. The investigation gained momentum within a few weeks while the Summer Safety Initiative was launched to confront gangs and violence, putting officers on foot patrol in high-crime areas. Officers built relationships with residents of these communities, where some had a historic distrust of police and fears of gang retaliation. A related shooting occurred on 2 September at a TCHC townhouse complex on Chester Le Boulevard. Naod Tsegazab had tracked down Owusu to retaliate for trying to kill his brother, Nahom. However, Naod only shot Owusu once in the leg before his gun jammed. As a result of the shooting, a search warrant was carried out on Owusu's Chester Le Boulevard home, leading to cocaine trafficking charges. Naod was charged with the attempted murder of Owusu. The first murder charge of the Danzig Street shooting investigation was made against Mesquito on 7 November. He was charged with the attempted murder of Nahom Tsegazab, two counts of first-degree murder and 23 counts of aggravated assault.