Sometime over the weekend, anonymous vandals stuck a garden hose through the front-door mail slot of lawyer Sean Riddell’s Northeast Portland office and left the water running. Someone who works in the office -- a house converted into business space -- discovered the mess about 2:30 p.m. Sunday. Among Riddell’s work for the ICE employees’ union, he asked Oregon and federal officials last October to investigate Mayor Ted Wheeler for directing Portland police officers not to respond to some calls for service at a protest outside the Southwest Macadam ICE field office.