Dynamics CRM Plugin Query TotalRecordCount returning -1

I am working on a plugin and have written a function to pull back any incidents that have the ticket number passed into the function. A fairly simple function but for some reason I am receiving back a -1 value from the property TotalRecordCount on the EntityCollection. My understanding is that this means it is not finding any records at all but I know that there is a record with the ticket number being passed in. I must be missing something anyone have any thoughts?

 internal EntityReference fetchCaseByCaseNumber(string caseNumber, IOrganizationService service, ITracingService tracingService)
        {
            Entity incident;

            //tracingService.Trace("Creating QueryByAttribute");
            //QueryByAttribute querybyattribute = new QueryByAttribute("incident");
            //querybyattribute.ColumnSet = new ColumnSet("incidentid", "ticketnumber");
            //querybyattribute.Attributes.AddRange("ticketnumber");
            //querybyattribute.Values.AddRange(caseNumber);
            //EntityCollection incidents = service.RetrieveMultiple(querybyattribute);


            tracingService.Trace("Creating Query...");
            QueryExpression query = new QueryExpression
            {
                EntityName = "incident",
                //PageInfo = new PagingInfo() {count },
                ColumnSet = new ColumnSet("incidentid", "ticketnumber"),
                Criteria = new FilterExpression
                {
                    Conditions =
                                {
                                    new ConditionExpression
                                    {
                                        AttributeName = "ticketnumber",
                                        Operator = ConditionOperator.Equal,
                                        Values = {caseNumber}
                                    }
                                }
                }
            };
            tracingService.Trace("Running Query");
            EntityCollection incidents = service.RetrieveMultiple(query);
            tracingService.Trace("fetching total count");
            int count = incidents.TotalRecordCount;
//            incident = incidents.Entities.First();
            if (count == 1)
            {
                incident = incidents.Entities.First();
            }
            else
            {
                tracingService.Trace(String.Format("{0} incidents found with ticketnumber",incidents.TotalRecordCount.ToString()));
                throw new InvalidPluginExecutionException("Duplicate ticket number error");
            }
            EntityReference caseReference = new EntityReference("incident",incident.Id);
            return caseReference;
        }