(By Ames Alexander, aalexander@charlotteobserver.com) The former head of Mecklenburg County's troubled mental health department has received final pay of nearly $100,000 for unused vacation and sick time - a development that has commissioners from both parties promising to re-examine sick-leave payouts.The county payment to Grayce Crockett is sparking a debate about Mecklenburg's policy, which sets no limits on the amount of money that departing employees can collect for accrued sick time.