Sheppard Mullin Richter & Hampton has made four partner hires from collapsed firm Heller Ehrman. Peter Hecker, Neil Popovic, Anna McLean and Joanne Garvey have all joined the San Francisco office as partners. Popovic and McLean join the firm's business trial practice group, while Garvey joins the tax practice. The hires take number of Heller partners to join Sheppard Mullin up to 10.