While waiting in an interview room at the police station, Smith tried to swallow some paper. It turned out to be two business cards for a public storage facility in Fairfax County.
When authorities searched his unit there, police found 9mm ammunition, two shoulder holsters, a Glock 9mm magazine and an empty box labelled Glockstore.com. Later, sales orders showed Smith had purchased from the California company all the parts necessary to make a Glock 9mm pistol, according to the statement of facts.The search history on his phone from the day before the attack included "Glock 19 rapid fire," "Methods of stalking," and "How to sneak up on the enemy." After the attack, he searched "3 effective ways to remove blood stains," "Removal of DNA contamination" and "Altering barrel rifling." He also looked for news articles about his grandfather's death.
Police found a large blood stain on the inside of Smith's pants pocket the day of his arrest, but the full gun was never found.
Scott's daughter told police her father had kicked Smith out for ordering gun parts and having them shipped to the house, according to the statement of facts. Smith was not allowed to have guns because he has a felony conviction from 2009, when he was caught carrying a pipebomb in Baltimore.
Smith is set to be sentenced on May 23, when he faces up to life in prison.
"It's very sad for the entire family," said Robert Jenkins, Smith's defense attorney. He said Smith "suffers from a long history of mental health issues," including schizophrenia and bipolar disorder, although "he certainly understands what he did and that what he did was wrong."