An actor on the Netflix series “13 Reasons Why” has been charged with stealing jewelry and valuables from elderly residents throughout Marin County, authorities said.

Bryan Box, a 23-year-old Vallejo resident, allegedly targeted former clients he once cared for as a home health-care aide. Box worked for caregiver agencies in Sausalito and Novato, police said.

The alleged crime spree occurred from approximately Sept. 22 to Nov. 7. In some cases, Box ostensibly dropped by their homes to discuss his new career on “13 Reasons Why” and offer small gifts or kind comments, the prosecution alleges.

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But later those residents would discover their homes had been burgled for valuables.

In one case, Box, learning that a former client was in an acute-care convalescent hospital, later placed a bogus call to the man’s wife to report he had died at the hospital, authorities allege. The distraught 72-year-old woman rushed to the hospital, where she was informed that her husband was alive and sleeping. Later, she discovered that jewelry was missing from her Tiburon home.

Box was arrested Dec. 29 at his family’s home on Trotter Drive in Vallejo. The Marin County District Attorney’s Office charged Box with nine felony counts including burglary, elder theft and possession of stolen property.

Bail was set at $250,000. He was released on a bail bond pending arraignment on Jan. 16 in Marin Superior Court.

Box could not be reached for comment Sunday on his cellphone.

The crimes reported so far include six cases in Mill Valley, Greenbrae, Tiburon and Novato, according to a prosecution affidavit by Deputy District Attorney Yvette Martinez-Shaw. The alleged victims are in their 70s, 80s and 90s.

The investigation included members of the Central Marin Police Authority, the Tiburon Police Department, the Mill Valley Police Department, the Novato Police Department and the Belvedere Police Department.

The investigators were able to build the case in part by comparing the burglary reports with Box’s cellphone records and the movements of his car, which was detected by the roadside police cameras in Tiburon.

The losses included gold, silver and diamond bracelets, watches, necklaces and rings. One burglary alone, on Del Casa Drive in Mill Valley, resulted in a loss of nearly $50,000 in valuables.

Other stolen property included medications, a laptop computer, a Social Security card, a surveillance camera and checks that were fraudulently cashed to Box’s account, authorities allege.

Investigators obtained a search warrant for Box’s residence and vehicle. The warrant was executed by Detective Russell Stiverson and Sgt. Shane Ford of the Tiburon Police Department, Central Marin police Cpl. Sean Kerr and several members of the Vallejo Police Department.

The search yielded suspected stolen property from burglaries in Marin as well as other incriminating evidence, authorities allege.

Investigators also visited an Oakland pawn shop linked to Box’s phone records and found more property.

The pawn shop manager “immediately recalled his recent interactions with defendant,” the prosecution affidavit says.

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“(The manager) was able to physically describe defendant and knew about his recent notoriety from the television show ‘13 Reasons Why,’” the filing says. “Defendant allegedly told (the manager) he had come into possession of a lot of jewelry due to the recent death of an aunt.”

Stiverson, the Tiburon police detective, said the records show that Box visited the pawn shop 29 times and made 95 sales. Each sale could involve many items.

Property from 43 of the sales was still at the pawn shop, Stiverson said. But the rest had been sold or melted down.

The investigation is continuing and could widen to jurisdictions throughout the Bay Area.

Box played a minor role as high school student Jamie Garrison in “13 Reasons Why,” a youth-oriented drama that was shot in Marin and other Bay Area sites. In a biographical clip on YouTube, Box says he got the part after responding to a casting post he saw on Facebook.

The producers could not be reached through an inquiry placed with Netflix.