code: def ReadClientCrashInfo(self, client_id, cursor=None):
      
      cursor.execute(
          "SELECT UNIX_TIMESTAMP(timestamp), crash_info "
          "FROM clients, client_crash_history WHERE "
          "clients.client_id = client_crash_history.client_id AND "
          "clients.last_crash_timestamp = client_crash_history.timestamp AND "
          "clients.client_id = %s", [db_utils.ClientIDToInt(client_id)])
      row = cursor.fetchone()
      if not row:
        return None
  
      timestamp, crash_info = row
      res = rdf_client.ClientCrash.FromSerializedString(crash_info)
      res.timestamp = mysql_utils.TimestampToRDFDatetime(timestamp)
      return res
docs: Reads the latest client crash record for a single client.