According to state records:

... Archuleta had three previous charges for weapons offenses, including a prohibited use of a weapon in Federal Heights in 2004 and carrying a concealed weapon in Denver in June.

According to one of his social media accounts,

... he is a freelance artist who specializes in animation, landscape design, concept art and texturing.... he attended the University of Colorado between 2007 and 2010.

For the past three years, Archuleta has helped run a boutique for infants and toddlers. Before that, he was the director of Step Up Inc., a faith-based life-skills workshop and recovery-support agency that focused on overcoming hopelessness, his profile says.

Stephanie's sister was one of those killed. Their mother (Sonny's mother-in-law) says:

“My daughter was murdered, my son-in-law was killed by the police because he’s sick,” said the shooter’s teary mother-in-law, Shannon. “He was still a human. We have no ill feelings towards him.”

One of the neighbors, a nurse who had treated some of the victims in the Aurora movie theater shootings, said:

“I could see the window shade, and all of a sudden the gun broke through the window and then he leaned out of the window and started shooting down toward the police,” she said.

“I’m a nurse so I’m supposed to stay cool . . . I didn’t know what was going on. I had the SWAT team in my front yard. I loaded my gun and got my daughter downstairs on the floor, and I waited.”

On his his twitter account his tag line is "Jesus is my Superhero." This is his current profile photo.

His brother Patrick had been killed in a shooting outside a Denver restaurant in 2011. Here's a photo of Patrick.

Here's the memorial painting Sonny made for Patrick. And this tribute photo.

While there is a tweet about cooking a breakfast in his lab, it appears from the attached photo he really was cooking breakfast, not drugs. (His photos on four square use the handle Sun of G.)

He posted a lot of photos on FourSquare.

• He called his room the FortreSS of Solitudes Upper Sanctuary. (Photos here, here and here.)

• The painting he did for his brother's memorial

• He liked Crown Royal

• He had artistic tattoos and often referred to Superman.

• There were signs he had been troubled for a while. Feb. to June 2010 was a rough time for him.

• He has several tweets about being exhausted or not sleeping.

As a drug user, Sonny's acquisition and possession of a firearm are prohibited by federal law: 18 U.S.C Sec. 922(g):

g) It shall be unlawful for any person -
(1) who has been convicted in any court of, a crime punishable by imprisonment for a term exceeding one year;

....(3) who is an unlawful user of or addicted to any controlled substance (as defined in section 102 of the Controlled Substances Act (21 U.S.C. 802));

.... [to] possess in or affecting commerce, any firearm or ammunition; or to receive any firearm or ammunition which has been shipped or transported in interstate or foreign commerce.

Under 18 USC Sec. 922 (d):

(d) It shall be unlawful for any person to sell or otherwise dispose of any firearm or ammunition to any person knowing or
having reasonable cause to believe that such person -

...(3) is an unlawful user of or addicted to any controlled substance (as defined in section 102 of the Controlled Substances Act (21 U.S.C. 802));

Neither federal nor state laws stopped Sonny from getting his hands on guns -- even though they had been used to charge him with crimes. New laws wouldn't prevent this tragedy. What Sonny needed was early intervention and drug and mental health treatment. The signs were there.