One of its native sons, Ira Einhorn, was a co-founder of the environmentalist jubilee. But Mr. Einhorn has another line on his resume. In addition to being a environmental guru, and founder of Earth Day he is also the Unicorn Killer. While a student at the University of Pennsylvania, Mr. Einhorn dated a Bryn Mawr College graduate by the name of Holly Maddux. When the affair ended in 1977, Mr. Einhorn went into a jealous rage and murdered her. Ira Einhorn was arrested for murder March 28, 1979, the day the Three Mile Island nuclear plant accident occurred. Ira Einhorn, environmentalist, was charged with murder during the same period as one of the greatest environmental accidents in United States history.