Bree Walker, LMSW Submitted photo By Bree Walker, LMSW | Teen Lifeline Suicide is one of the leading causes of death for teens in Arizona, but it’s also preventable. Most young people who attempt suicide give warning signs beforehand. As adults, our challenge is recognizing those signs and knowing what to do next. At Teen Lifeline, a local 24/7/365 crisis hotline, trained teen peer counselors respond to thousands of calls and texts each year from Arizona youths.