CON cases are adult conservatorships established before the effective date of the Guardianship Protective Proceedings and Durable Power of Attorney Revision Amendment Act of 1989. Usually, in these cases, only a conservator of the property of a disabled adult was appointed, although sometimes a conservator of the person was also appointed. Very few of these cases remain open.
Since the enactment of the Guardianship Protective Proceedings and Durable Power of Attorney Revision Amendment Act of 1989, guardianships and conservatorships of incapacitated adults are opened as intervention proceedings (INT/IDD).
The old law conservatorship statute may be found at DC Code, secs. 21-1501 et seq. at your local library. Look for the 1973 edition of the DC Code.