The Denver Post on Friday filed a lawsuit against the newspaper’s former senior vice president of advertising and two other employees, accusing them of conspiring to use the newspaper’s trade secrets and confidential information to set up a competing advertising agency. The lawsuit, filed in Denver District Court, alleges the employees, before they resigned from The Post, solicited business from at least one of the newspaper’s advertisers. From top are Reid Wicoff, David Staley and Nicole Brennan The lawsuit names as defendants Reid Wicoff, the former senior vice president of advertising; David Staley, a former senior digital sales strategist for the newspaper; and Nicole Brennan, the former director of digital advertising operations.