How would YOU solve this case using today's technology?

There was a woman who was last seen in 1961 (early 30s at the time) the only traces left: kitchen was covered with red paint, but her corpse (if she was murdered) was not present at the scene nor was there a sign of foul play: since then, no hints of her presence or any sightings were ever recorded or confirmed by anyone else. (Do YOU think she’s still alive today?)

Back then: the internet, CCTV and cellphones were non existent meaning nobody saw what happened, how can you track someone who went missing for this long today even with the resources available? Multiple theories surfaced from: abducted, amnesia, passed from an accident but remains weren’t found or she staged and planned the entire thing.

If she was alive: she would’ve been close to 100 years old, but given the circumstances that she left with barely anything (no suitcases, just strolled somewhere never coming back willingly) the likelihood on finding her alive becomes slim (as the elements would’ve come by and died from starvation, disease or being murdered by someone in the middle of nowhere).