PROVIDENCE, R.I. (AP) — The shooting at Brown University on Saturday happened inside an engineering building at the eastern edge of campus, where the Ivy League school blends into a residential neighborhood. Hours before the attack, security camera footage captured a person of interest police say may have been “casing” a quiet and affluent corner of College Hill, just out of reach of the busier streets that cross through the urban campus in Providence, Rhode Island. Here is a timeline of video evidence that police and the FBI have disclosed so far: 2 p.m. to 2:08 p.m.: The earliest of videos disclosed by police show a person of interest in dark clothing and a mask sauntering along a Manning Street sidewalk before turning onto Cooke Street and later on George Street, passing stately mansions dating from the 19th and early 20th centuries.