 The increased enforcement is an echo of efforts last summer to quell summer violence. This time, the city is not asking businesses or food trucks for a voluntary curfew. One person has been arrested and charged with obstructing official business in last week's shooting. Police have not said if they believe 19-year-old D'Angelo Fuller fired a shot in the incident. Four shooters are believed to be involved, and authorities say they have received several tips from the community.