In 1990, Murray was registered as a home-schooled child with the Cherry Creek School District, said district spokeswoman Tustin Amole. He later took the Iowa test, a standard test given to third-graders nationwide at the time, said Amole. That is the last record that the district has on him.

Murray’s later school history indicates a young man adrift. He attended Arapahoe Community College for a while, then quit. Last year he enrolled for a class at Colorado Christian University but dropped out immediately after enrolling.

…The missionary group plans a press conference at 4 p.m. as well today. The organization said that although Murray worked for YWAM at one time, reports that he was a member are incorrect.

…In court papers filed Monday, police said the gunman had been thrown out of the missionary school about three years ago and had been sending hate mail to the program.

Murray has something in common with the sisters who died at New Life, Stephanie Works, 18, and Rachael Works, 16. They too were home-schooled.

Matthew Murray killed  26 year old Tiffany Johnson, and 24 year old Philip Crouse at Youth with a Mission in Arvada, Colorado. He then took an AK-47, a pistol and an automatic rifle to Colorado Springs New Life Church and killed Stephanie Works, 18, and Rachael Works, 16. Their father, 51 year old David Works is in stable condition. Murray also wounded two YWAM staffers: Charlie Blanch, 22, and Dan Griebenow, 24 and two New Life Church attendees Judy Purcell, 40, and 59 year old Larry Bourbannais. 
The Murray family has been described to media as deeply religious by a friend; 21 year old Christopher, Matthew’s brother attends Oral Roberts University.

via: The Denver Post

YWAM statement:

The victims at New Life Church, sisters Stephanie Works (18) and Rachel Works (16) were involved with a summer outreach organized by New Life Church and a ministry of YWAM which rents office space in the New Life campus. An older sister from the Works family participated in a YWAM Discipleship Training Program at a centre in Colorado Springs.

Murray was briefly a student at the YWAM Arvada training centre in 2002. He was enrolled in a Discipleship Training School (DTS) but did not complete the program. The DTS is a 12 week classroom course followed by a 12 week field assignment, usually to another culture. The goal of the program is to form Christian character and assist students in discovering their unique, God-given talents. Cross-cultural exposure and global awareness are special emphases throughout these courses, preparing the students to use their talents to obey the commands of Jesus. The program also involves local outreach with nearby churches and communities, and each student is involved in helping run the practical operations of the YWAM centre.

…YWAM would like to express its heartfelt condolences to the families of the other victims. Our hearts also go out to the Murray family, to whom we extend a spirit of forgiveness.

Matthew Murray - loner
Murray family asks for forgiveness
Police believe Murray motive was revenge
Between the time Matthew Murray killed 26 year old Tiffany Johnson, and 24 year old Philip Crouse in Arvada, and before he went to New Life Church and killed Stephanie and Rachel Works he went online and posted some of the writing of high school killer Eric Harris and said good-bye.
The forum for people who have left Pentecostalism and fundamentalism, took down his writings  yesterday. Members contacted the FBI when he made threats.
Murray had mental health problems during his time at YWAM.
Update: Coroner rules Murray death a suicide