He is accused of the murder of his wife, Lucy, 38, at their five-bedroom home in Besford, Worcs.
Mrs Landry was found by neighbours yards from the home the couple shared with their daughter, seven, and Mrs Landry’s 14-year-old son by a previous marriage.
She died in a neighbour’s arms at 11.45pm on Monday night after she fell into his garden hedge with a kitchen knife embedded in her side. The children are believed to have been in the house at the time.
Mr Landry, who has four adult children in America, recently returned to the house after a three week break, according to neighbours.
He made his fortune designing hydraulic cranes on oil rigs in Texas. He had a house in Mexico and offices in Brazil. He was believed to have met his wife on the internet in 2000 while she researched a degree in town planning.
The senior investigating officer in the case, Det Chief Insp Lee Davenport, said: “West Mercia Police have charged a 63-year-old man with the murder of 38-year-old Mrs Lucy Landry.
“We would like to reassure residents living in the area that this was an isolated incident and that we are not looking for anyone else in connection with Mrs Landry’s murder.”
An inquest into Mrs Landry’s death is expected to be opened and adjourned on Friday.