According to the Tennessean, Warner had extensive experience with electronics and alarm systems, and worked as a computer tech with the real estate firm Fridrich & Clark.
Federal agents searched his Antioch home on Saturday, as well as the Fridrich & Clark office in Nashville. Neighbors recalled seeing a similar looking RV on the property for the past few years, however in the weeks before the explosion, Warner built a fence around his property and drove it into his yard.
The still have yet to identity a motive for the bombing, although they believe the AT&T building was the primary target of the bombing.
In addition to Warner, three other people were injured in the blast, however more than 40 buildings were damages, many with severe structural damage.
The Metropolitan Nashville Police Department have also identified the six officers (heroes) that worked to evacuate residents prior to the blast:
Officer Brenna Hosey, who has been with the department for 4 years;
Officer James Luellen, who has been with the department for 3 years;
Officer Michael Sipos, who has been with the department for 16 months;
Officer Amanda Topping, who has been with the department for 21 months;
Officer James Wells, who has been with the department for 21 months; and
Sergeant Timothy Miller, who has been with the department for 11 years.