
RANCHO CUCAMONGA, Calif. (KABC) -- The FBI has joined the search for a Rancho Cucamonga man who has been missing since last March, authorities said.
Nai Ping Hou was reported missing more than a year ago, and San Bernardino County sheriff's deputies believe he may have been kidnapped.
Family members believe his disappearance could be tied to the family's success with cryptocurrency, authorities said.
"I miss him a lot," said Wen Hou about his father during an interview with Eyewitness News last July. "He's sort of a guide to my life."
Wen Hou, who made a fortune in cryptocurrency, even donating $1.1 million to the USC Keck School of Medicine to research heart disease, said he believes someone has stolen his father's identity and plundered his bank accounts for more than $1 million.
Wen also said he believes whoever did it was impersonating his father in communication with family members via text message.
"It's just so crazy that somebody might be impersonating my dad via text message," Wen said.

The San Bernardino County Sheriff's Department is investigating the case as a possible kidnapping and is asking for the public's help in finding clues.
Wen said the family is offering a $250,000 reward for information leading to either Nai Ping's safe return or information leading to the arrest and conviction of those responsible.