My husband recieved a letter from the Orphan's Court in Upper Marlboro, MD stating that a bond be set in the amount of 1,500.00 to secure his release. To me it sounds like they have issue a warrant.
Sounds like your husband was the Personal Representative of an Estate or somehow connected with an Estate and was sent a notice to appear in court. When he failed to appear, a Show Cause Order for contempt was probably issued and that set another hearing. The procedure is that when someone doesn't show for the contempt proceeding a Writ of Body Attachment is issued and that is probably what has the bond requirement.
This is serious and indicates a serious problem. Your husband should immediately see an estate litigation lawyer - this is more an estate issue than a criminal issue.