Question: Police officers, armed with model MarkV-A1, were shot at the end of a protest against police killings of Alton Sterling in Baton Rouge, Louisiana, and Philando Castile in Falcon Heights, Minnesota, what was used to disable the shooter?  
Context: Taking a Stand in Baton Rouge is a photograph of Ieshia Evans, a nurse from Pennsylvania, being arrested by police officers dressed in riot gear during a protest in Baton Rouge, Louisiana, on 9 July 2016.  The protest began in the aftermath of the shooting by police of Alton Sterling and Philando Castile.  The image, taken by Jonathan Bachman for Reuters, became a viral phenomenon on social media, described by several media organizations as "iconic", with some comparing the image (and Evans) to the photograph of "Tank Man" in the Tiananmen Square protests of 1989. KHMA-TV was a short-lived independent television station in Houma, Louisiana that served the south Louisiana community.  The FCC licensed channel 11 to St. Anthony TV Corporation in 1958, and the station was intended to be an ABC affiliate.  In the 1960s, St. Anthony TV Corp. petitioned to move the station's transmitter to a point north of Houma near Geismar, LA so that the station could also serve Baton Rouge (which did not have a primary ABC affiliate yet).  After the FCC granted permission to move the tower, both Louisiana Television Broadcasting Corporation (owner of Baton Rouge's then-NBC affiliate WBRZ, (now Baton Rouge's ABC affiliate) and Guaranty Broadcasting Corporation (owner of Baton Rouge's CBS affiliate WAFB) filed an appeal to block the transfer.  In 1965, the District Court of Appeals ruled in favor of the two Baton Rouge stations, blocking the FCC's grant. On July 7, 2016, Micah Xavier Johnson ambushed and fired upon a group of police officers in Dallas, Texas, killing five officers and injuring nine others.  Two civilians were also wounded.  Johnson was an Army Reserve Afghan War veteran who was reportedly angry over police shootings of black men and stated that he wanted to kill white people, especially white police officers.  The shooting happened at the end of a protest against police killings of Alton Sterling in Baton Rouge, Louisiana, and Philando Castile in Falcon Heights, Minnesota, which had occurred in the preceding days. Baton Rouge Magnet High School (BRMHS or Baton Rouge High) is a public magnet school in Baton Rouge, Louisiana, founded in 1880.  It is part of the East Baton Rouge Parish School System with a student body of approximately 1500 students.  The current building was built in 1926, and, as Baton Rouge High School, was listed on the National Register of Historic Places in 1986.  The campus underwent a two-year renovation and expansion starting in 2010, resulting in the addition of two new wings to the main building.  This renovation was completed and the school reopened in fall 2012.  Baton Rouge High is also one of the highest-ranked schools in the state, and consistently wins state-level academic competitions.  The school requires students to pass enrollment standards and exceed graduation standards.  As a result, nearly all graduating students attend college. The Baton Rouge Open Invitational, first played as The Baton Rouge Open, was a PGA Tour event that was played in Baton Rouge, Louisiana in the 1950s and early 1960s.  It was played at the Baton Rouge Country Club every year except 1961; that year course renovations were taking place and the event was played at Sherwood Forest Country Club.  The Baton Rouge Country Club's par-72, 18-hole "Baton Rouge" course was designed by Joseph S. Finger and opened in 1916. On July 17, 2016, Gavin Eugene Long shot six police officers in Baton Rouge, Louisiana, in the wake of the shooting of Alton Sterling.  Three died and three were hospitalized, one critically; of the officers who died, two were members of the Baton Rouge Police Department, while the third worked for the East Baton Rouge Parish Sheriff's Office.  Long, who associated himself with organizations linked to black separatism and the sovereign citizen movement, was shot and killed by a SWAT officer during a shootout with police at the scene.  Police arrested and questioned two other suspects, but Long was confirmed to be the only person involved in the shooting. The flag of Baton Rouge is the city flag of Baton Rouge, capital city of Louisiana.  It has a field of crimson representing the great Indian Nations that once inhabited the area.  Their red-colored poles erected along the Mississippi River in the area gave the city its name.  The crest on the lower left uses the red, white and blue, representing the colors of the United States.  The upper left of the shield is the fleur-de-lis representing France, the upper right is the a castle taken from the flag of the Kingdom of Castile, representing Spain, and the lower portion is the pre-1801 Union Flag of the Kingdom of Great Britain.  The coat of arms encompasses the emblems of the three European countries whose flags have flown over Baton Rouge.  The name "Baton Rouge" in white appears prominently on the field of crimson. On July 6, 2016, Philando Castile was shot and killed by Jeronimo Yanez, a St. Anthony, Minnesota, police officer, after being pulled over in Falcon Heights, a suburb of Saint Paul.  Castile was in a car with his girlfriend, Diamond Reynolds, and her four-year-old daughter when he was pulled over by Yanez and another officer. On July 5, 2016, Alton Sterling, a 37-year-old black man, was shot several times at close range while held down on the ground by two Baton Rouge Police Department officers, Howie Lake II and Blane Salamoni, in Baton Rouge, Louisiana.  Police were responding to a report that a man in a red shirt was selling CDs, and that he had used a gun to threaten a man outside a convenience store.  The shooting was recorded by multiple bystanders.  A loaded handgun was in Sterling's front pants pocket. This particular model was utilized by the Dallas Police Department to kill a gunman that murdered five police officers on July 7, 2016.  Officers used the robot to deliver a charge of C4 which was then detonated next to the gunman.
Answer: C4