Katharina Lieselotte Kiszonak, known as Kathy, was 27 when she vanished from downtown Las Vegas. She was last seen July 16, 1985, in the 2900 block of Fremont Street and did not have a vehicle. Katharina sometimes used the aliases Darlene Brannan and Darlene Brannon and sometimes spelled her surname Koszonak.

Descriptions note a white female with blonde hair, hazel eyes, plastic-framed prescription eyeglasses, crooked teeth, a rising-sun-and-birds tattoo on her right shoulder, and track marks on her arms. On the day she disappeared she reportedly wore a light-colored shirt or blouse, blue jeans (size 7 or 9) and tennis shoes.

The Las Vegas Metropolitan Police Department opened a missing person investigation that is now handled by its Cold Case Missing Persons detail. DNA from her mother and sister has been submitted to national databases. There has been no confirmed contact from Katharina since July 16, 1985.

If anyone knew Katharina, her whereabouts around mid-July 1985, or recognized the aliases, can you share what you remember?