Authorities took Theobald "Theo" Lengyel into custody without incident in Santa Cruz County.
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Capitola police say their investigation began when Alice Herrmann's family reported her missing on Dec. 3. Her family says she didn't show up for work and didn't return any calls or texts.
After conducting interviews and gathering evidence, detectives determined that foul play was involved and identified Lengyel as a person of interest.
The investigation also led detectives to Tilden Regional Park in Berkeley where they were able to recover human remains. The identification of those remains is pending DNA confirmation from the Contra Costa County Coroner's Office.
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