Sloppy drafting in the “employers liability exclusion” endorsement that James River Insurance Co. added to the commercial general liability policy it sold to Omega Demolition gave three additional insureds (Judlau Contracting, Imperial Crane and Burns & McDonnell Engineering) an opening to argue they were entitled to coverage under the CGL policy when they were sued for an accident that killed Vincente Santoyo while he was working as a laborer for Omega on a highway project.If there hadn’t been a …