LONDON — A British aristocrat and her boyfriend were sentenced to 14 years in prison on Monday for killing their newborn daughter while on the run from authorities.

Constance Marten, 38, and her boyfriend Mark Gordon, 51, a convicted sex offender, were sentenced Monday after being found guilty of gross negligence manslaughter at London’s Central Criminal Court in July. They were previously convicted of perverting the course of justice, concealing the birth of a child and child cruelty. Gordon will serve a further four years on extended license.

Police launched a nationwide search after officers found a placenta on Jan. 5, 2023, in a burned-out car belonging to Marten and Gordon near Bolton in northwestern England.

The couple traveled across England and went off-grid, spending hundreds o

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