Jeff Daniels, Portia de Rossi and James Spader will star in “Eye Witness” for Promark Entertainment Group.To be helmed by Rowdy Herrington, political thriller concerns an international aid worker who goes to Mexico and becomes entwined in a murder mystery. Written by Robert Ozn and Colin Greene, pic is skedded to begin production June 28 in San Juan, Puerto Rico. Producing are David Bixler and Shelly Strong. Jon Kramer will serve as executive producer. Daniels will next be seen in Clint Eastwood’s “Blood Work” for Warner Bros. Pictures. De Rossi stars in the upcoming Paramount Classics release “Who Is Cletis Tout?” Spader stars in the upcoming “Secretary,” which premiered at the 2002 Sundance Film Festival. Lions Gate Films will release the pic in the fall.