By Susan Heavey WASHINGTON (Reuters) -A suspect in shootings of five homeless men, two fatally, in Washington and New York, was taken into custody on Tuesday by federal agents in Washington, but New York police said investigators were still gathering evidence to charge him with the New York crimes. Gerald Brevard, 30, of southeast Washington, D.C., was charged with homicide, assault with a dangerous weapon and assault with intent to kill, a spokesman for Washington’s Metropolitan Police Department said. The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) said special agents found the…