The documents below provide information on the US National Suicide Prevention Lifeline policy and practice of covertly tracing calls, texts, and online interactions without caller knowledge or consent, and sending police and ambulance or mobile mental health crisis teams to visit and potentially take callers to psychiatric hospitals. See my article about these issues here: Suicide Hotlines Bill Themselves as Confidential, Even as Some Trace Your Call.
Lifeline Policy for Helping Callers at Imminent Risk of Suicide (SAMHSA and NSPL). This describes the policy for call tracing and police interventions, and also provides historical background to the policy.
NENA Suicide Prevention Standard (National Emergency Number Association and NSPL). This outlines some of the technology and processes involved in implementing the policy.
Helping Callers to the National Suicide Prevention Lifeline Who are at Imminent Risk of Suicide (Draper, Murphy et al. Journal of the American Association of Suicidology). I provide a full copy of this published journal article written by directors of the NSPL because I believe it is in the public interest for it to be generally available.
Results of a 2017-18 Survey of National Suicide Prevention Lifeline Call Centers (NSPL, SAMHSA, and Vibrant Emotional Health). This contains data on numbers of calls traced, obtained through freedom of information processes. Also contains financial and other information about the call centers.
Call Volumes and Reasons for Calls to National Suicide Prevention Lifeline Call Centers (NSPL and SAMHSA). This contains data on the main reasons for calls, obtained through freedom of information processes.
SAMHSA, Vibrant Emotional Health, and National Suicide Prevention Lifeline Centers Network Agreement Contract (SAMHSA, Vibrant Emotional Health, NSPL, and Call Centers). This is the official agreement that all crisis centers must sign to become members of the NSPL, and also describes the intervention policy.
Featured diagram above is from a Canadian Radio-Television and Telecommunications Commission report.
See my follow-up article “Roll-out of 988 Threatens Anonymity of Crisis Lines.” Some of the related documents are these minutes of meetings at the National Suicide Prevention Lifeline: Standards, Practices and Training Committee Meeting August 2020; Lived Experience Committee Meeting October 2020; Standards, Practices and Training Committee Meeting December 2020.