• Mr. Conditt is believed to be linked to six bombs that killed two people and injured five others. Four explosions hit locations in Austin where bombs were left. An additional device detonated at a FedEx distribution center in Schertz, Tex., near San Antonio, while the sixth was found undetonated in a facility near Austin-Bergstrom International Airport.
• Mr. Conditt created a blog about his political views as a requirement for a political-science class he took at Austin Community College, according to McKenna McIntosh, a classmate of Mr. Conditt’s. In an author description, he described himself as a conservative. His posts include arguments against same-sex marriage and sex offender registries and a defense of the death penalty.
• Mr. Conditt, the oldest of four children, was home-schooled by his mother. He also attended Austin Community College from 2010 to 2012, but did not graduate.
• The suspect was described as a quiet man from a “tight-knit, godly family” by Donna Sebastian Harp, who had known the family for nearly 18 years. “He was a nerd, always reading, devouring books and computers and things like that,” Ms. Harp said.
What we don’t know
• The suspect’s motive is still unclear. The first explosions hit African-American residents whose families are well-known in the city’s black community, though two white men were injured by an explosive triggered by a tripwire on Sunday.
• It is not yet clear whether Mr. Conditt acted alone or was working with others. Officials have not ruled out the possibility that he had accomplices.
• It is not known whether the suspect mailed or placed other explosive devices that have yet to detonate.