Just weeks before police say an illegal immigrant and alleged MS-13 gang member shot and killed a 14-year-old Silver Spring boy, the 20-year-old man was charged with concealing a dangerous weapon by a Montgomery County police officer, court records show.

The citation was issued on Oct. 3, a little less than a month before police say Hector Hernandez — an El Salvadoran illegal immigrant living in Takoma Park — opened fire on a Montgomery County bus, killing Tai Lam and wounding two other teens, ages 14 and 15.