Amber Aiaz, 34, and her 12-year-old daughter Melissa Fu were last seen November 22, 2019, in Irvine, California. Amber, who also used the name Mei Yi Wu, was reportedly driving back from Las Vegas that day after sourcing produce for her business. Amber’s husband and Melissa’s stepfather, Cheng Zhang, says two people knocked, sprayed him with a substance that rendered him unconscious, and that when he woke there were bloodstains and a bloody handprint in the apartment and both women were gone.

Zhang reported finding handwritten notes in Chinese saying the pair would be returned if he did not contact police; he says he received additional notes, cleaned the carpet, painted over the handprint and posed as his wife on WeChat to tell Melissa’s school she was ill. He reported them missing on December 2, 2019. Investigators initially viewed Zhang as the primary suspect but later said their extensive inquiry — including interviews and long surveillance — found no evidence to contradict his account or link him to the disappearance. The FBI offered a $10,000 reward; there has been no activity on Amber’s or Melissa’s bank accounts or passports and no confirmed sign they left the country.

What information do readers have that could help locate Amber or Melissa?