/**
  * 
  */
 private function _checkEntity()
 {
     $t_entity = new ca_entities($vn_id = $this->opo_request->getParameter('id', pInteger));
     if (!$t_entity->getPrimaryKey()) {
         return $this->makeResponse(array(), 500, 'Victim ID is invalid');
     }
     // is the entity a victim?
     if ($t_entity->getTypeID() != $this->opn_victim_type_id) {
         return $this->makeResponse(array(), 500, 'Entity is not of type "victim"; expected ' . $this->opn_victim_type_id . '; got ' . $t_entity->getTypeID());
     }
     return $t_entity;
 }