Former Lamar policeman involved in murder-suicide - KOAM TV 7

Updated at 5:15 PM CST:  Statement released by Kathy Jenkins, AOK Board of Directors President:

"Dana Thompson Ison was a beloved friend, coworker, daughter, sister and mother. She was an invaluable member of the AOK family as a social worker and school-age program coordinator. She also led the mentoring program and offered counseling and assistance to anyone in need. She loved the children and they loved her. She was passionate about making a difference in their lives and she did. Words cannot express our sorrow at her passing."

Updated at 3:10 PM CST:  A former Lamar policeman has shot and killed his wife, shot and injured his mother-in-law, then shot and killed himself.

Authorities say early this morning Landon Ison shot his wife, Dana Ison, in the family home, as well as his mother-in-law, Cheryl Thompson.  It's unclear why Thompson was at the home but she went to get help from neighbors who called 911 before 1 a.m. this morning.  Thompson was taken by LifeFlight for life threatening injuries.

Landon Ison's body was found at a different location at about 2:30 a.m.  Authorities say he shot himself with a rifle.

In August Landon Ison resigned from the Lamar Police Department, but authorities say he just stopped coming to work.

Landon and Dana Ison had two children.  They were at the home at the time of the shooting but were not injured are currently with family.

Authorities say they were married for about nine years and while the couple was still married, that had separated earlier in October.

Dana Ison worked at AOK, an organization that works with under-privileged children.

Authorities were not sure if Landon Ison was currently employed.

Authorities say the investigation is ongoing.

Updated at 1:50 PM CST:  The Missouri Highway Patrol confirms two people are dead and another person is in critical condition at a Springfield hospital.

A press conference is scheduled for 2 p.m.  We will post more information as it is confirmed.

Reported October 9, 2012 at 12:11 PM CST:  Authorities are investigating an overnight shooting death in southwest Missouri.

The Missouri Highway Patrol is leading the investigation of a shooting outside of Lamar shortly after 1 a.m. this morning with the assistance of the Barton County sheriff.

A reporter is on the scene and we will provide more information as it is confirmed.