AUSTIN, Texas - State troopers say Sunday's shooting was fueled by domestic issues. Some - even President Donald Trump - claim mental illness was a factor.

However, mental health advocates dispute the president's assessment, but encourage survivors to seek help as they cope with life-altering trauma.

Effective Sept. 1, state lawmakers added millions of dollars in new funding to mental health services. Those investments focus on the local level through state grants.

"The funding increase for mental health was in the hundreds of millions of dollars," said Greg Hansch of NAMI Texas. "We are definitely closing that gap, but we definitely have a long way to go, without question."

The National Alliance on Mental Illness, or NAMI, says it's too soon to conclude the attack was prompted by mental illness. Hansch said mental illness should be one of the factors both investigators and policymakers examine.

"We need to look at what that intervention should have been--whether that's a firearms access issue, whether it's something that could have been prevented through addressing the mental health workforce shortage, or investing broader resources in our mental health system," Hansch said.

On Sunday afternoon, President Trump said mental illness prompted the deadly shooting, and that gun control was not a factor.

"Based on preliminary reports, (this was) a very deranged individual - a lot of problems over a long period of time," Trump said. "We have a lot of mental health problems in our country."

On Monday, investigators said they believe the motive was a domestic issue with the shooter.

"It's important not to rush to judgement, and it's important to get all the facts," Hansch said.

On top of that, Hansch encourages those survivors of the attack to seek counseling quickly. He said symptoms include a lack of appetite, difficulty sleeping, anxiety or a bout of depression.

"There's no question that incidents of mass violence like this one can have an extremely traumatic effect on people who are on the scene, family members of survivors and the community as a whole," he said.

You can call your local mental health resource center or the National Disaster Distress Helpline at 1-800-985-5990. You can also text "TalkWithUs" to 66746. Operators are available 24 hours a day.