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.

Mark Anthony Conditt, 23, blew himself up with one of his homemade, shrapnel-loaded bombs on March 20 as a SWAT team moved in to arrest him.

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.

Mark Conditt allegedly taped himself saying "I wish I were sorry, but I'm not" in a cell phone messaged recorded as investigators closed in on him.

Take a look at the top stories that made headlines this week, including the manhunt for the Austin "serial bomber."

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.

Jeff and Nancy Reep said they never noticed anything unusual about Mark Conditt.

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

Mark Conditt, 23, allegedly left a 25-minute recording on his phone confessing to making seven bombs, authorities said.

The alleged bomber died after he detonated an explosive in his vehicle in a confrontation with police outside Austin, according to the Austin Police Department.

The 19-day bombing spree in Austin, Texas, killed two and wounded at least five.

His family said it was unaware of the "darkness" he must have been in.

Mark Conditt allegedly detailed differences 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.

As a suspected serial bomber or bombers has the city of Austin, Texas on edge.

Law enforcement sources have named Mark Anthony Conditt as the suspect in Austin's string of deadly bombings.

The man accused of killing two and injuring four killed himself with another bomb after local and federal agents surrounded him.

ABC News' Pierre Thomas and ABC News' contributor and former FBI agent Brad Garrett share the latest details on the suspect who killed himself with a bomb, according to officials.

According to local media, the man accused of multiple attacks this month is dead after an officer-involved shooting in Round Rock, Texas

The man accused of killing two and injuring four by planting explosives in and around Austin, Texas, has killed himself with another bomb after local and federal agents surrounded him Wednesday.

The string of explosions that have so far left two dead and four injured have the city on edge and sparked hundreds of law enforcement to descend on the area.

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.

Fedex said it gave authorities another package sent by the same individual.

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.

"What's going on in Austin -- a great place, a tremendous place -- is absolutely disgraceful," Trump said. "We have to find this very sick person or people."

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.

The explosion at a mail facility near San Antonio, Texas, comes just two days after a bomb went off in Austin, Texas.

Police in Austin, Texas, said the device had been detonated by a tripwire.

A fourth blast happened on Sunday.

The explosion was the fourth incident this month in Austin.

Residents of Austin, Texas, are being asked to report any suspicious packages as police investigate three explosions that took place after people handled boxes that had been delivered to their homes.

Austin Mayor Steve Adler and Police Chief Brian Manley tell "GMA" the latest details on the investigation into three package explosions at local homes.

Authorities say the devices were triggered to explode when picked up.

Authorities have urged residents to remain on the lookout for strange items after deadly package bombs were delivered to Austin-area homes.

Austin Mayor Steve Adler and Police Chief Brian Manley describe what they know about a fourth explosion and their message to Austin residents.

Investigators are determining whether the explosion is linked to three other bombings over an 11-day period that killed two people and injured two others.

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.