Brian Brimager was arrested and indicted by a federal grand jury Thursday in San Diego in the disappearance of Yvonne Baldelli.
Baldelli went missing in November 2011 when she left a restaurant with Brimager. Prosecutors believe he killed Yvonne Baldelli two months after they moved to Panama and dumped her body in the ocean near their cottage.
Brimager has not been charged with murder, but he does face obstruction of justice charges involving alleged actions to cover up the crime.
Investigators say Brimager sent emails to Baldelli's family and withdrew money from her bank account to make it look like she was still alive.
If convicted on all counts, Brimager could face life in prison.