Question: Cristóbal de Tapia was sent to investigate the conduct of the leader of an expedition that caused the fall of what?

Context paragraphs:
Estadio Municipal de San Cristóbal de las Casas: The Estadio Municipal de San Cristóbal de las Casas is a multi-use stadium located in San Cristóbal de las Casas, Chiapas, Mexico.  It is currently used mostly for football matches and is the home stadium for Ocelotes UNACH.  The stadium has a capacity of 5,000 people.

La Laguna Cathedral: The Cathedral of San Cristóbal de La Laguna or Catedral de Nuestra Señora de los Remedios ("Santa Iglesia Catedral de San Cristóbal de La Laguna" in Spanish) is a Roman Catholic church in Tenerife, Spain.  Begun in 1904 and completed in 1915, it is dedicated to the Virgin of Los Remedios (patron of the Roman Catholic Diocese of San Cristóbal de La Laguna).  The cathedral is the mother church of the diocese, which includes the islands of Tenerife, La Palma, La Gomera and El Hierro in the province of Santa Cruz de Tenerife.  It is therefore where the episcopal seat of the bishop of this diocese, currently occupied by Bishop Bernardo Álvarez Afonso.  This is one of the most important churches of the Canary Islands.

Domingo Pérez Cáceres: Domingo Pérez Cáceres (November 10, 1892, Güímar, Tenerife, Canary Islands, Spain) - August 1, 1961, San Cristóbal de La Laguna, Tenerife) was a Spanish ecclesiastic, eighth Bishop of the Roman Catholic Diocese of San Cristóbal de La Laguna.  Was one of the most prominent bishops in the history of the Canary Islands, being well known for their aid to poor people in Canary Islands (it was known as the ""bishop of the poor""), who gave money, and for his many positions in the Catholic Church.

Felipe Fernández García: Felipe Fernández García (30 August 1935 – 6 April 2012) was the Roman Catholic eleventh bishop of the Roman Catholic Diocese of San Cristóbal de La Laguna and bishop Ávila, Spain.  It was the eleventh bishop of San Cristóbal de La Laguna.

Hernán Cortés: Hernán Cortés de Monroy y Pizarro Altamirano, Marquis of the Valley of Oaxaca (] ; 1485 – December 2, 1547) was a Spanish "Conquistador" who led an expedition that caused the fall of the Aztec Empire and brought large portions of mainland Mexico under the rule of the King of Castile in the early 16th century.  Cortés was part of the generation of Spanish colonizers who began the first phase of the Spanish colonization of the Americas.

Tegueste, Santa Cruz de Tenerife: Tegueste is a town and a municipality of the northeastern part of the island of Tenerife in the Santa Cruz de Tenerife province, on the Canary Islands, Spain.  It is completely surrounded by the municipality of San Cristóbal de La Laguna.  The town Tegueste is located 4 km northwest of San Cristóbal de La Laguna and 11 km northwest of the island capital Santa Cruz de Tenerife.  Tegueste became independent from San Cristóbal de La Laguna in the 17th century.

Cristóbal de Tapia: Cristóbal de Tapia was an inspector sent to New Spain in 1521 to investigate the conduct of the conquistador Hernán Cortés, and if he deemed it necessary, to arrest him and bring him to trial.  Because his authority derived from the king and superseded that of Cortés, his name appears on some lists of Spanish colonial rulers of New Spain, although he exercised this authority very briefly.

Luis Franco Cascón: Luis Franco Cascón (Mansilla del Páramo, León, 1903 - San Cristóbal de La Laguna, Tenerife, 17 August 1984) was a Spanish ecclesiastic, ninth Bishop of the Roman Catholic Diocese of San Cristóbal de La Laguna.

San Cristóbal de La Paz: San Cristóbal de La Paz was a fortress in Chile that was established in 1621 by Governor Cristóbal de la Cerda y Sotomayor.  It was located five or six kilometers to the southwest of Yumbel on the west shore of the Claro River to the north of its confluence with the Laja River.  In 1646 a mission and a small church was established that grew into a settlement with a few inhabitants.  In February 1655 both the fort and settlement were destroyed by the Mapuche, and it was reestablished in 1663 under the temporary governor Ángel de Peredo.  This settlement lasted until the Mapuche rising of 1766 when it was abandoned and never rebuilt.

San Cristóbal de las Casas National Airport: San Cristóbal de las Casas National Airport (Spanish: "Aeropuerto Nacional de San Cristóbal de las Casas" ) formerly (IATA: SZT, ICAO: MMSC) was an airport located 18 km from the city of San Cristóbal de las Casas in the state of Chiapas, Mexico.  It was operated by Aeropuertos y Servicios Auxiliares (English: Airports and Auxiliary Services ), a corporation of the federal government.  It was also known as Corazón de María Airport.

Supporting paragraphs: Cristóbal de Tapia Hernán Cortés
Answer: the Aztec Empire