Question: How many people did the mass murderer, who was responsible for sparking the creation of the NICS Improvement Amendments Act of 2007, kill?

Context articles: Fritz Angerstein
Repeal of the Implementation of the NICS Improvement Amendments Act of 2007
Clapper v. Amnesty International USA
Seung-Hui Cho
Protect America Act of 2007
Income Tax Amendments Act, 2006
NICS Improvement Amendments Act of 2007
Unique Device Identification
Centers for Medicare and Medicaid Services
History of the Patriot Act

Fritz Heinrich Angerstein (January 3, 1891 – November 17, 1925) was a German mass murderer, who killed 8 people at his home in Haiger, on December 1, 1924.
 The subject of a media spectacle, Angerstein, along with Fritz Haarmann and Peter Kürten, is considered one of the "three great mass murderer trials" of the Weimar Republic-era of Germany.
Repeal of the Implementation of the NICS Improvement Amendments Act of 2007
Clapper v. Amnesty International, 568 U.S. 398 (2013) , was a United States Supreme Court case in which the Court held that Amnesty International USA and others lacked standing to challenge (also known as Section 702) of the Foreign Intelligence Surveillance Act as amended by the Foreign Intelligence Surveillance Act of 1978 Amendments Act of 2008.
Seung-Hui Cho (in Korean, properly Cho Seung-Hui; January 18, 1984 – April 16, 2007) was a South Korean spree killer and mass murderer who killed 32 people and wounded 17 others armed with two semi-automatic pistols on April 16, 2007, at the Virginia Polytechnic Institute and State University in Blacksburg, Virginia.
 An additional six people were injured jumping from windows to escape.
 He was a senior-level undergraduate student at the university.
 The shooting rampage came to be known as the Virginia Tech shooting.
 Cho committed suicide after police breached the doors of the building where most of the shooting had taken place.
 His body is buried in Fairfax, Virginia.
The Protect America Act of 2007 (PAA), (Pub.L.
 110–55 , 121 Stat.
 552 , enacted by ), is a controversial amendment to the Foreign Intelligence Surveillance Act (FISA) that was signed into law by U.S. President George W. Bush on August 5, 2007.
 It removed the warrant requirement for government surveillance of foreign intelligence targets "reasonably believed" to be outside of the United States.
 The FISA Amendments Act of 2008 reauthorized many provisions of the Protect America Act in Title VII of FISA.
The Tax Amendments Act, 2006 is a Bill in the Canadian Legislature numbered as Bill C-10 of the second session of the 39th Parliament of Canada and containing a controversial clause that David Cronenberg and Sarah Polley have argued represents censorship of Canadian films.
 The long form title of the bill is "An Act to amend the Income Tax Act, including amendments in relation to foreign investment entities and non-resident trusts, and to provide for the bijural expression of the provisions of that Act".
 Among a 600-page list of minor changes to tax law, the bill contains a clause, "Section 120(3)(b)", that would give the government power to deny taxation benefits for films made in Canada if the government deems the content to be objectionable.
 Critics of the clause argue that it is equivalent to censorship because most Canadian films cannot afford to be produced without government assistance.
 The Bill was passed in the House of Commons October 29, 2007, but opposition parties later said that they did not notice the controversial part and several Senators have said that they intend to send the bill back to the House.
The NICS Improvement Amendments Act was passed in 2007 in the wake of the Virginia Tech shootings in order to address loopholes in the National Instant Criminal Background Check System, commonly known as NICS, which enabled Seung-Hui Cho to buy firearms despite having been ruled a danger to himself by a Virginia court.
The Unique Device Identification (UDI) System is intended to assign a unique identifier to medical devices within the United States.
 It was signed into law on September 27, 2007, as part of the Food and Drug Administration Amendments Act of 2007.
 This act includes language related to the establishment of a Unique Device Identification System.
 When implemented, the new system will require:
The Centers for Medicare & Medicaid Services (CMS), previously known as the Health Care Financing Administration (HCFA), is a federal agency within the United States Department of Health and Human Services (HHS) that administers the Medicare program and works in partnership with state governments to administer Medicaid, the State Children's Health Insurance Program (SCHIP), and health insurance portability standards.
 In addition to these programs, CMS has other responsibilities, including the administrative simplification standards from the Health Insurance Portability and Accountability Act of 1996 (HIPAA), quality standards in long-term care facilities (more commonly referred to as nursing homes) through its survey and certification process, clinical laboratory quality standards under the Clinical Laboratory Improvement Amendments, and oversight of HealthCare.gov.
The history of the USA PATRIOT Act involved many parties who opposed and supported the legislation, which was proposed, enacted and signed into law 45 days after the September 11 terrorist attacks in 2001.
 The USA PATRIOT Act, though approved by large majorities in the U.S. Senate and House of Representative, was controversial, and parts of the law were invalidated or modified by successful legal challenges over constitutional infringements to civil liberties.
 The Act had several sunset provisions, most reauthorized by the "USA PATRIOT Improvement and Reauthorization Act of 2005" and the "USA PATRIOT Act Additional Reauthorizing Amendments Act."
 Both reauthorizations incorporated amendments to the original USA PATRIOT Act, and other federal laws.