Austin police SWAT officer Robert Justesen said they knew “we had to stop him that night”: “He didn't care who he hurt or killed at this point.”

The suspect had terrorized the city for 19 days before authorities said he blew himself up with a bomb inside his vehicle as they were closing in.

Police officers reflect on the escalating scare a year ago and how they planned to tackle the issue. ABC News' Brad Mielke reports.

ABC News goes inside the investigation into the string of explosions that terrorized Texas last year.

The Austin bombing suspect used a child safety sign to conceal a bomb.

The declaration in the case of the Austin bombings came during a panel discussion this morning that was focused on the handling of the case.

Draylen Mason, 17, had been accepted to the Oberlin Conservatory of Music program.

The parents of the man who police say set off a string of bombs in the Austin area are "devastated for the other families," neighbors said.

Mark Conditt allegedly detailed differences in all seven bombs that he made.

The Austin bomber used the name “Kelly Killmore” to ship two packages containing bombs via FedEx shortly after 7:30 pm on Sunday, according to law enforcement sources.

The alleged Texas "serial bomber" died when an explosive detonated in his car.

The suspect in a string of connected, deadly bombings has been identified.

Police are now looking into a fifth blast.

Agents literally pieced together bomb in pursuit of suspect, official says.

A man was injured when he handled an artillery simulator dropped off at a Goodwill store.

Police have been warning residents about suspicious packages since the second and third package bombs detonated at residences in the Texas capital on March 12.

The threat in Austin amid the serial bombings is so omnipresent that a father has now decided to pull his baby's stroller behind him for fear of running over a tripwire.

President Trump made his first comments related to the Austin bombings in a meeting with Saudi Arabia's crown prince.

The explosion was the fourth incident this month in Austin.

A fourth blast happened on Sunday.

Austin Police Chief Brian Manley said the reward had been increased to $100,000.

Austin, Texas, residents have taken police warnings to heart, phoning in hundreds of times about suspicious packages in the wake of this month’s deadly bombings there.

New, unnerving details about the suspected bomb-maker that authorities believe is responsible for the deadly package explosions in Austin, Texas.