"After that, he got out of the meeting and he turned to a friend of mine and the only thing he said was like 'I have a message for everyone: just say that now you will see your star'," Werner told CNN.
Murray left the training centre and made no further visits, according to the YWAM statement.
He had, however, been sending hate mail to the centre, police said in court papers Monday.
Witnesses at YWAM's training centre said the gunman had entered and asked to spend the night at the dormitory but was turned down. He then opened fire, killing two young adults and wounding two others. They described him as a 20-year-old white male, wearing a dark jacket and skull cap.
About 12 hours later, witnesses at New Life Church in Colorado Springs described the gunman as wearing a dark trench coat and carrying a high-powered rifle.
He opened fire in the church parking lot, killing two teenage girls and wounding their father, and walked about 60 feet into the church before a church security guard - Jeanne Assam - shot him. He was struck multiple times by the officer, but a new report indicated Murray died after firing a single shot at himself, the El Paso County Coroner's Office concluded after an autopsy, according The Associated Press.
An 11:00am worship service had just ended about half an hour prior to the shooting and most worshippers had already left. Several hundred were still at the megachurch campus, according to New Life Senior Pastor Brady Boyd.
Police determined through investigations that "most likely the suspect in both shootings are one in the same".
Boyd said the shooting was a "random, senseless" act and that the gunman was unknown at New Life. The "common denominator", however, was Youth With a Mission - YWAM maintains a satellite office at the megachurch.
While news about the Arvada shooting had prompted New Life to beef up security that day, the 10,000-member church - the largest in the state - had always kept security volunteers at the church.
Boyd explained that in a culture that has become more open, churches have increasingly become targets of people who are "aggravated and upset".
Megachurches across the country are taking more precautions as violence against religious groups and churches is on the rise in the US. Some churches open their doors daily.
Earlier this year, megachurch pastor Bishop TD Jakes held his third annual S.T.O.P.P.E.D. - Security Training Offering Procedure Protection Education and Direction - conference, urging safety.
Authorities in Colorado Springs said the gunman at New Life had apparently intended to gun down many more victims before he was shot by Assam. He was carrying an assault rifle, two handguns and as many as 1,000 rounds of ammunition.
"God was with me," said Assam as she described her confrontation with the gunman. "God made me strong."
