The reward is up to $50,000 and family and friends have  scoured for tips, even doing a podcast about the case. Still, no one knows what happened to Jenna Van Gelderen two years ago.

Her loved ones recently expressed frustration about the lack of leads in the case, venting in a Facebook post about the anniversary of her disappearance.

“Two years of frustration,” the post said. “People often ask ask us, what's going on with the case? It's hard to even respond to that as we just don't know. So much of what the authorities do is kept under wraps from us and not shared, they keep telling us they are actively working the case and don't feel like the work they are doing is being appreciated.”

Van Gelderen, then 25 years old, vanished from her parents' Druid Hills home on Aug. 19, 2017. She had been house-sitting, but when her brother arrived to meet her that evening she was gone.

Van Gelderen’s phone later pinged in Fairburn and her car was found two weeks later, miles away in Northwest Atlanta.

A spokesman for the DeKalb County Police Department said on Wednesday that the case is still open. Both state and federal authorities have been asked to assist; still there are no answers to where Van Gelderen went and if she was with anyone.

Read more | A year later, missing woman's family hopes for answers

Police said previously that they don’t suspect foul play and that it appeared as if Van Gelderen left and locked the door behind her. She is on the autism spectrum, and her family said she sometimes had issues realizing when she was in dangerous situations.

For the second year in a row, family, friends and supporters were encouraged to light Shabbat candles in Van Gelderen’s honor last Friday.

Anyone with any information about Jenna’s disappearance is encouraged to call Crimestoppers at (404) 577-TIPS (8477).