PORTLAND, Maine — Roughly 250 supporters rallied outside the Portland police station before coursing through Congress Street and delivering poems and speeches at City Hall Saturday evening. The protest, organized by a collective of Maine youth activists using the banner Black Lives Matter — Maine, decried racial injustice and police brutality following this week’s grand jury decision in the case related to the death of Breonna Taylor, a 26-year-old Black woman who police officers fatally shot around 12:40 a.m.