<Ul> <Li> David Rossi (Joe Mantegna), senior supervisory special agent (seasons 3--present) </Li> </Ul> <Li> David Rossi (Joe Mantegna), senior supervisory special agent (seasons 3--present) </Li> <Dl> <Dd> Rossi is a highly experienced profiler who once worked the BAU in its origins, then took early retirement in 1997 to write books and go on lecture tours about criminal analysis, until volunteering to return shortly after SSA Jason Gideon's departure in 2007 . He has been married three times and is quite wealthy because of his successful writing career . In the episode "From Childhood's Hour" (season 7), David reconnects with his first wife, Carolyn Baker, who has shocking news for him . It is revealed that she came to him because she was diagnosed with ALS (Lou Gehrig's disease) and wants David to assist in her suicide . In the next episode ("Epilogue"), Carolyn dies after taking a drug overdose . It is also revealed in this episode that David had a son who died at birth . In the season 8 episode "The Fallen," it is revealed that David was a Marine in Vietnam . The season 7 finale ("Hit") reveals SSA David Rossi may be having a secret relationship with Section Chief Erin Strauss; this was discovered when technical analyst Penelope Garcia and SSA Dr. Spencer Reid spot them both leaving a hotel . In the last season 8 episode ("The Replicator") we see their relationship has been known to the entire team . The episode is an emotional one for SSA David Rossi since Unit Chief Erin Strauss is murdered by The Replicator . She was taken from her hotel room, where he had planned to meet her that night, drugged and put on the streets of New York disoriented for Unit Chief Aaron Hotchner to find her . The episode's last scene is SSA David Rossi eulogizing her to the team after her funeral, at a gathering at his home . In season 10 we learn that David has a daughter by his second wife . Since then, he is shown to have a strong relationship with his daughter, son - in - law, and grandson, even approving of her husband's Italian heritage . In season 11 Rossi reunites with his second wife, and they give their relationship a second chance . </Dd> </Dl> <Dd> Rossi is a highly experienced profiler who once worked the BAU in its origins, then took early retirement in 1997 to write books and go on lecture tours about criminal analysis, until volunteering to return shortly after SSA Jason Gideon's departure in 2007 . He has been married three times and is quite wealthy because of his successful writing career . In the episode "From Childhood's Hour" (season 7), David reconnects with his first wife, Carolyn Baker, who has shocking news for him . It is revealed that she came to him because she was diagnosed with ALS (Lou Gehrig's disease) and wants David to assist in her suicide . In the next episode ("Epilogue"), Carolyn dies after taking a drug overdose . It is also revealed in this episode that David had a son who died at birth . In the season 8 episode "The Fallen," it is revealed that David was a Marine in Vietnam . The season 7 finale ("Hit") reveals SSA David Rossi may be having a secret relationship with Section Chief Erin Strauss; this was discovered when technical analyst Penelope Garcia and SSA Dr. Spencer Reid spot them both leaving a hotel . In the last season 8 episode ("The Replicator") we see their relationship has been known to the entire team . The episode is an emotional one for SSA David Rossi since Unit Chief Erin Strauss is murdered by The Replicator . She was taken from her hotel room, where he had planned to meet her that night, drugged and put on the streets of New York disoriented for Unit Chief Aaron Hotchner to find her . The episode's last scene is SSA David Rossi eulogizing her to the team after her funeral, at a gathering at his home . In season 10 we learn that David has a daughter by his second wife . Since then, he is shown to have a strong relationship with his daughter, son - in - law, and grandson, even approving of her husband's Italian heritage . In season 11 Rossi reunites with his second wife, and they give their relationship a second chance . </Dd>

Who has been in the most episodes of criminal minds