It's way more than two, that's the point of listing the names for current and prospective parents:
1. Valerie Heron, Tranquility Bay suicide while at program
2. Ryan Grasso, death at home after SCL 12/12/05
3. Corey Murphy, suicide after Paradise Cove
4. Chris Sutton, on trial for hiring hitman to murder parents (mom killed, dad left blind from gunshot injuries)- count mom as a casualty
5. Girl at SCL who hung herself while at SCL- name?
6. Christopher Landre, suicide after Paradise Cove
7. Randi Koetz, suicide after Casa by the Sea 4/10/05
8. Bryan Richardson, murdered by brother after Casa by the Sea 2/27/05
9. Robert Carter Evans, suicide 4/10/05
10. Michael "Romeo" Perry, Murder (on death row in Texas). Casa By The Sea
Keep this list going, people.