FORT WORTH -

The former Navy reservist who killed 12 people at the Washington Navy Yard had ties to Texas.

One day after the shooting, many of the people who knew Aaron Alexis, a 34-year-old information technology employee with a defense contractor, said they wish they would have noticed something sooner and said something before Monday’s tragedy.

Many of Alexis' former friends told Local 2 there were warning signs along the way, but none seemed to be enough for them to think the 34-year-old could be responsible for a mass shooting.

A former friend of Alexis said he tried damaging her car when she let him borrow it for a day.

“Apparently he poured sugar in our gas tank,” said Kristi Suthamtewakul.

In Fort Worth, Alexis was known in different areas of the community. He had friends at the Buddhist temple where he mediated. But most of friends and one of his roommates, worked at a Thai restaurant off White Settlement Road.  

Some say he was angry with the government.

“He felt some anger and frustration towards our government because of his benefits,” said Suthamtewakul. There were some financial issues whether he was getting paid, he wasn't getting paid on time and he wasn't getting paid the right amount; but, never to the point where I thought he would do something to this magnitude.”

As investigators search for the motive into why Alexis would walk into the Washington Navy Yard and kill a dozen people, his past is being called into question.

From his discharge for misconduct in 2011 from the Fort Worth Naval Air Station, to his run ins with the law in North Texas and Seattle, both involve the firing of guns.

There’s also his apparent obsession with video games, which some friends say he would play games like “Call of Duty” for hours on end.

U.S. Sen. John Cornyn, of Texas, spoke Tuesday about the tragedy that occurred in our nation's capital.

"When I heard about this shooting yesterday as I was traveling from Texas back to Washington D.C. I couldn't help but think about a not too dissimilar tragedy that occurred about four years ago at Fort Hood, Texas when Major Nidal Hassan killed 13 people there as well as shot more than 30 others who were injured," said Sen. John Cornyn (R-Texas). " At this difficult time we of course pray for these souls that were unexpectedly taken from us.  We pray for comfort for  their grieving families and friends and we pray that healing may come quickly for those that were wounded. We witnessed evil yesterday but as so often is the case when the unthinkable occurs accounts of tremendous bravery and self-sacrifice emerged."