Sibylle Zitko, 54, went missing from the Lock 7 area of the C&O Canal in Cabin John, on Thursday, Jan. 6.
Zitko had last been seen in Bethesda around 6 a.m. that day, authorities said.
Detectives are asking anyone who may have information leading to Zitko’s whereabouts to contact USPP Dispatch at (202) 610-7500 or the Criminal Investigations Tip Line at (202) 379-4877 or via email at USPP_tipline@nps.gov.
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