FedEx officials provided "key evidence" that led to the suspect's identification, the company told employees in an internal memo seen by Reuters on Wednesday. So investigators hit the area's stores, scanning receipts and looking for clues.
Police later found another package containing an explosive device at another FedEx facility near Austin-Bergstrom International Airport.
The facility was temporarily evacuated during the search as a precaution.
Manley said the suspect's identify wouldn't be officially released until the medical examiner confirmed it and his next of kin are notified.
Public safety personnel came to Austin High School and "cleared" it as a part of a followup investigation, the school district tweeted, adding "students and staff are safe".
The president praised law enforcement officials for resolving this issue.
Pflugerville, TX, Mayor Victor Gonzales told the Associated Press Conditt lived two blocks away from him, but he did not have a personal relationship with family.
The man accused of plaguing the Austin area for weeks with deadly bombings has been identified after blowing himself up and being shot by authorities during a deadly confrontation with police early Wednesday, according to officials.
The newspaper reports that he had recently worked for Crux Semiconductor in Austin as a "purchasing Agent/buyer/shipping and receiving", citing a profile on a job recruiting website. He was never confrontational.
Police said the suspect is responsible for the bombings in Austin, but they are still investigating why he carried them out.
"We don't know where this suspect has spent his last 24 hours and therefore we still need to remain vigilant to ensure that no other packages or devices have been left to the community", Mr Manley said.
"What we do know is we believe the same person built each one of these devices", said Mr Milanowski, the agent in charge of the Houston division of the ATF.
Authorities managed to track the 24-year-old suspect to a motel in Round Rock using surveillance footage and cell phone triangulation.
They later identified the suspect's vehicle and spotted it Wednesday night at a hotel in Round Rock, Texas, a few miles north of Austin.
"The suspect is deceased and has significant injuries from a blast that occurred from detonating a bomb inside his vehicle", Manley told reporters.
Milanowski said the suspect had purchased explosive materials recently. Once he got in his vehicle, they pursued him until he pulled onto the side of the road. When the vehicle went into a ditch, Conditt detonated the explosive device inside as two SWAT team members approached. The blast knocked back one officer, while a second officer fired his weapon, Manley said. "No injuries were reported", said a joint statement from local and federal authorities.
Texas Gov. Greg Abbott says that at this point, investigators believe the Austin bombing suspect acted alone.
Anthony Stephan House, 39, died, after he picked up a package on his front porch on March 2.
The blast also injured Mason's mother. No one was injured in that incident. The explosives killed two people and seriously wounded four others. Those victims are expected to fully recover.
A fifth parcel bomb en route to Austin detonated early Tuesday, injuring one person at a FedEx distribution center near San Antonio, some 120 km southwest of Austin.