The Wilton Police Department approved the reopening of the Wilton Loop of the Norwalk River Valley Trail late yesterday afternoon following a dog-coyote encounter Saturday.  The yellow tape and notices were removed after monitoring the Trail since the incident.  Animal control found no evidence of current coyote presence.  But trail officials reminded users that coyotes are common in the Wilton area.  On Saturday a dog broke free of its leash and owner when a coyote was spotted.  The dog was uninjured during the close encounter.