Updated

The son of a Northern California woman still missing after the arrests of four people suspected of kidnapping her says he is baffled why anyone would abduct his mother for ransom.

John Babb said at a news conference Tuesday in Vallejo (vuh-LAY-ho) that his mother, 57-year-old Elvira Babb, was bankrupt and neither he nor anyone in their family has the $60,000 that was demanded.

Elvira Babb was last seen June 29 by a co-worker who dropped her off at a Vallejo market. Her son received a text the next day demanding money and threatening his mother's life. An investigation led to the arrests.

Vallejo police Lt. Jeff Bassett says Elvira Babb knew one of the suspects scheduled to be arraigned Tuesday but declined to comment on her relationship to him.