Natasha Yi said "personal information has recently been discovered that leads us to believe JV will not be coming back."
Constance Marten had disappeared with boyfriend Mark Gordon after her baby was born in January.
Bao Fan hasn't been seen in several days. His bank, China Renaissance, urged employees to "not believe in or spread rumors."
Sands went missing on Jan. 13 while hiking on California's Mount Baldy.
Hamzah Alsaudi, a San Francisco State University political science major, disappeared while swimming with his wrestling teammates.
The "Room With A View" actor and another hiker, Bob Gregory, are both missing as dangerous winter weather conditions hit the San Gabriel Mountains.
The Massachusetts man, now charged with his wife Ana's murder, made dozens of searches related to how to dismember and handle a body, prosecutors said.
Family members last saw Lesley Lemoine of South Carolina in March.
“At this time the family would love prayers and privacy. Thank you all!!!," the rapper's cousin wrote on Instagram.
"Wherever you are send us some signal. No matter what we will come get you son," said Lary Moses London, the rapper's father, in a statement.