Luxury fashion designers found shot dead in California as family reportedly reveals troubling lead-up

"This remains an active and ongoing investigation. No additional details are being provided at this time," Oakland police told Fox News Digital.

Paul Min described a troubling decline in his brother-in-law after he allegedly lost millions of dollars in risky financial ventures, according to the outlet.

He called Walker the "most honest, responsible, hardworking guy you have ever known" and struggled to reconcile the suspected violence with the man he had known and loved for nearly four decades, the outlet reported.

Min said he and his sister agreed Walker needed psychiatric help after Walker allegedly suggested that the three of them "end things."

Michelle Min was planning to have her husband admitted for psychiatric treatment on the day of the shooting, her brother told the outlet. 

Police have not confirmed the family's claims about Walker's mental health, financial losses or a possible motive.

The couple met in Kansas in the 1980s before following Min's parents to California and eventually building their Berkeley clothing business, according to the LA Times.

Bryn Walker has been based in Berkeley since 1992 and designs and produces its clothing in the San Francisco Bay Area, according to the company's website. The brand says it operates six company-owned stores and supplies roughly 1,000 boutiques nationwide.

Its store directory lists two Berkeley locations and a shop in Vineyard Haven, Massachusetts, on Martha's Vineyard.

Fox News Digital also reached out to Berkeley police for comment.

Anyone with information, video or photos related to the case is asked to contact Oakland police's Homicide Section at 510-238-3821, its tip line at 510-238-7950 or email cidvideos@oaklandca.gov.