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Aviation officials said that Hein and his student, Robert Christopher Marshall, were in a Piper PA-31P, when for unknown reasons, the left engine of the plane began to smoke. As the pilot attempted to return to the airport, the plane went down and crashed into a nearby field. Both were killed.<ref>{{cite web|url=http://www.texas-wrongful-death-lawyer.net/88959/robert-marshall-kelle-hein-accident-laredo-tx.htm|title=Robert Marshall, Kelle Hein Killed in Laredo, TX, Airplane Accident Near Laredo Airport|publisher=Texas-wrongful-death-lawyer.net|date=March 9, 2018|accessdate=March 21, 2018}}</ref> Marshall, a sophomore at [[Baylor University]] in [[Waco, Texas|Waco]], Texas, was the son of  Robert R. and Amy Marshall, both members of the Webb Consolidated Independent School District based in Bruni in eastern Webb County. The senior Marshall, the president and chief executive officer of Marshall Aviation, an on-demand charter service for passengers and freight aircraft. The Marshalls owned the plane which went down. The National Transportation Safety Board is investigating the crash.<ref>{{cite web|url=https://www.lmtonline.com/local/article/One-victim-identified-in-plane-crash-that-killed-12741634.php|title=Officials ID victims in Laredo plane crash that killed |publisher=''The Laredo Morning Times''|date=March 9, 2018|author=Cesar G. Rodriguez and JeriLynn Thorpe,|accessdate=March 21, 2018}}</ref>

Aviation officials said that Hein and his student, Robert Christopher Marshall, were in a Piper PA-31P, when for unknown reasons, the left engine of the plane began to smoke. As the pilot attempted to return to the airport, the plane went down and crashed into a nearby field. Both were killed.<ref>{{cite web|url=http://www.texas-wrongful-death-lawyer.net/88959/robert-marshall-kelle-hein-accident-laredo-tx.htm|title=Robert Marshall, Kelle Hein Killed in Laredo, TX, Airplane Accident Near Laredo Airport|publisher=Texas-wrongful-death-lawyer.net|date=March 9, 2018|accessdate=March 21, 2018}}</ref> Marshall, a sophomore at [[Baylor University]] in [[Waco, Texas|Waco]], Texas, was the son of  Robert R. and Amy Marshall, both members of the Webb Consolidated Independent School District based in Bruni in eastern Webb County. The senior Marshall, the president and chief executive officer of Marshall Aviation, an on-demand charter service for passengers and freight aircraft. The Marshalls owned the plane which went down. The National Transportation Safety Board is investigating the crash.<ref>{{cite web|url=https://www.lmtonline.com/local/article/One-victim-identified-in-plane-crash-that-killed-12741634.php|title=Officials ID victims in Laredo plane crash that killed |publisher=''The Laredo Morning Times''|date=March 9, 2018|author=Cesar G. Rodriguez and JeriLynn Thorpe,|accessdate=March 21, 2018}}</ref>

In 1985 in Waco, Hein wed the former Tammy Waldrop. There are five Hein children, Kelle Hein, Jr. (wife Colby) of Conroe, Texas; Kalen Paul Hein (wife Brandi), Kyla Hein, Kiery Hein Saldivar (husband Alejandro), and Kesha Hein, and four grandchildren. His father-in-law was the Reverend Bill Waldrop (1939-2021), a [[Minnesota]] native who was for a time pastor of the Laredo Baptist Tabernacle and an Independent Baptist missionary to Mexico and several other locations within the United States. His mother-in-law is the former Carolyn Gant.<ref name=obit/><ref>{{cite web|url=https://www.lmtonline.com/obituaries/article/Reverend-Bill-Waldrop-15956960.php|title=Reverend Bill Waldrop|publisher=''The Laredo Morning Times''|date=February 19, 2021}}</ref>

In 1985 in Waco, Hein wed the former Tammy Waldrop. There are five Hein children, Kelle Hein, Jr. (wife Colby) of Conroe, Texas; Kalen Paul Hein (wife Brandi), Kyla Hein, Kiery Hein Saldivar (husband Alejandro), and Kesha Hein, and four grandchildren. His father-in-law was the Reverend Bill Waldrop (1939-2021), a native of [[rural]] Itasca in Hill County, Texas, who was for a time pastor of the Laredo Baptist Tabernacle and an Independent Baptist missionary to Mexico and several other locations within the United States. His mother-in-law is the former Carolyn Gant.<ref name=obit/><ref>{{cite web|url=https://www.lmtonline.com/obituaries/article/Reverend-Bill-Waldrop-15956960.php|title=Reverend Bill Waldrop|publisher=''The Laredo Morning Times''|date=February 19, 2021}}</ref>

The deaths of the crash victims were met with disbelief and sorrow in the Laredo community. Many [[Facebook]] users commented on the tragedy. "The world lost one of the good guys," remarked one post in reference to Hein.<ref>{{cite web|url=https://www.lmtonline.com/local/article/Facebook-mourns-deaths-of-teen-Laredo-preacher-12746934.php|title=Facebook mourns death of Laredo teen, preacher killed in plane crash|date=March 12, 2018|author=JeriLynn Thorpe|publisher=''The Laredo Morning Times''|accessdate=March 21, 2018}}</ref>

The deaths of the crash victims were met with disbelief and sorrow in the Laredo community. Many [[Facebook]] users commented on the tragedy. "The world lost one of the good guys," remarked one post in reference to Hein.<ref>{{cite web|url=https://www.lmtonline.com/local/article/Facebook-mourns-deaths-of-teen-Laredo-preacher-12746934.php|title=Facebook mourns death of Laredo teen, preacher killed in plane crash|date=March 12, 2018|author=JeriLynn Thorpe|publisher=''The Laredo Morning Times''|accessdate=March 21, 2018}}</ref>