J. Frank Miller III, one of the multifamily industry's top executives, died unexpectedly last month due to heart disease at age 55. Miller had served as chairman and CEO of JPI Cos. since he founded the Dallas-based development firm in 1989. Under Miller's leadership, the company has become one of the largest rental developers and managers in the country. With an $8 billion portfolio under management at current market value, the firm landed the No. 29 spot on the 2006 MFE Top 50 list of the largest multifamily managers and the No. 22 spot on the builders list.