Authorities surround the home of the Austin bombing suspect Mark Conditt in Pflugerville, Texas, Wednesday, March 21, 2018. Authorities say Conditt, a man suspected of planting several deadly bombs in the Texas capital this month, blew himself up in a motel parking lot overnight as a SWAT team approached his SUV. (Jay Janner /Austin American-Statesman via AP) 
Officials investigate near a vehicle, center, where a suspect in the deadly bombings that terrorized Austin blew himself up as authorities closed in on him, in Round Rock, Texas, Wednesday, March 21, 2018. (Jay Janner/Austin American-Statesman via AP) 
ADDS THE YEAR 2010, WHEN THE PHOTO WAS CREATED – This 2010 student ID photo released by Austin Community College shows Mark Anthony Conditt, who attended classes there between 2010 and 2012, according to the school. Conditt, the suspect in the deadly bombings that terrorized Austin, blew himself up early Wednesday, March 21, 2018, as authorities closed in on him, bringing a grisly end to a three-week manhunt. (Austin Community College via AP) 
A robot is prepared for use at the scene of Walnut and 2nd Street in Pflugerville, Texas, on Wednesday, March 21, 2018 where Austin, Texas bombing suspect Mark Anthony Conditt lived. As a SWAT team closed in, the suspected bomber whose deadly explosives terrorized Austin for three weeks used one of his own devices to blow himself up early Wednesday. (Tom Reel/The San Antonio Express-News via AP)
PFLUGERVILLE | Investigators on Thursday finished questioning the second roommate of the man they say spent weeks planting bombs around Texas’ capital before using one of his own devices to blow himself up, but a more complete picture of the 23-year-old community college dropout remains elusive.
Police said they’d released the second of two people who shared a home in Pflugerville, just north of Austin, with serial bombing suspect Mark Conditt. The other roommate was taken into custody Wednesday and released hours later. Investigators haven’t named them, saying they weren’t under arrest.
Conditt made a 25-minute cellphone recording before his death. It was recovered Wednesday, after he detonated one of his own bombs along the side of Interstate 35 just outside of Austin as a SWAT team moved in.
But investigators say the recording provides few clues as to Conditt’s motives — and they’ve refused to release it publicly, citing the ongoing investigation.
Conditt built bombs planted in different parts of the city that killed two people and severely wounded four others over three weeks starting on March 2. He began by placing explosives in packages left overnight on doorsteps, then rigged an explosive to a tripwire along a public trail. Finally, he sent two parcels with bombs via FedEx.
All of the early victims were black or Hispanic, though the tripwire bomb injured two white men.
As fear grew, Conditt eventually was tracked down through store surveillance video, cellphone signals and witness accounts of a customer shipping FedEx packages in a disguise that included a blond wig and gloves.
Police found him early Wednesday at a hotel. And when his car moved, they followed and forced him off the road, setting up the confrontation that ended in an explosion.
Austin Mayor Steve Adler praised police officers for stopping Conditt’s sport utility vehicle before he could get onto the highway, even though they were aware he likely had explosive devices inside and they did not have as much backup as planned.
“We hear about folks who run into danger to keep us safe and we had one of those moments in very graphic and specific detail,” Adler said at a news conference Thursday.
NAACP Austin President Nelson Linder said the manhunt’s end was a relief but that the public needs answers on what motivated Conditt, including whether the first two victims were targeted because they are from prominent black families.
“I don’t think it’s random at this point,” Linder said. “We’re going to withhold our judgment and keep searching for information and why he killed those people.”
Investigators have released few details about Conditt, who was unemployed, home-schooled and attended Austin Community College until 2012 but didn’t graduate.
The Austin American-Statesman reported Thursday that a bomb Conditt made and shipped via FedEx had been addressed to an employee at a downtown Austin spa. It was intercepted at a processing center without exploding.
Anita Ward works at Austin Med Spa and says that police and federal agents told her that her daughter, who also works there, was meant to be the recipient of the unexploded package.
Ward declined to name her daughter, who she said doesn’t know Conditt. Police haven’t commented.