A former aide to San Jose Councilman Terry Gregory testified Wednesday that on days his boss would get wound up intimidating big-box retailers for donations or browbeating city planners to sink projects he opposed, his staff used a code word warning that Gregory was on the warpath. ``The staff code word was `purple.' He had `purple' days,'' said Craig Mann, Gregory's former chief of staff, in front of a special ethics task force investigating allegations the District 7 councilman solicited and accepted gifts and donations, and committed dozens of violations of city and state fundraising laws. In his most revealing...