(PLACENTIA, Calif.) — The Southern California teacher whose students found her hanging from her classroom ceiling knew the devastating effects of suicide: Her own father went missing and was found dead with a bullet wound to his head after committing suicide nearly four years earlier. Jillian Jacobson, 31, had spoken with students about her father’s suicide and had counseled one class of students just a few weeks ago, saying if they ever felt down, they should ask for help. Jacobson did a weeklong unit on depression for freshmen, emphasizing that suicide wasn’t the answer to anyone’s problems and it affected many people greatly. On Monday, students arriving to their morning photography class found the door to Jacobson’s room locked.