they include captain paul mur pi, are sergeant sarah haller, sergeant phillip thomas, captain michael melon took his own life about a year fall after he retires. u don't talk suicide behind the walls. that is something that shows emotion and emotional weakness. reporter: therapist mary, works with many prison gleams and seen increase in the number and severity of the cases. >> totally, totally full blown affecting their lives. work. sometimes he nounce punitive action. no within in the administration of the department of corrections would speak with us on camera about the increase in suicides. but in a statement, they tell us, they are working to better understand how the stress of this job impacts employees and how they can of fer more support. >> i think it is much more stressful, today, than its ever was. reporter: this officer don't want to be identified pause he is still on the job. oh he lost one friend to suicide about yous with able to help another wo was desperate and depressed. >> said, you you know, i gat gun inside of my night stand, and he says, and i really thought about