Anti-corruption officials in Mexico are investigating the attorney-general’s office in the central state of Morelos after it was accused of covering up the murder of a young woman, Ariadna López.
The body of López, 27, was found by a highway in Morelos last week.
Morelos’s attorney-general’s office said she had choked while being drunk.
But a second post-mortem done in Mexico City concluded she had died of multiple force trauma.
Mexico City’s mayor said the Morelos attorney-general’s office “wanted to hide the femicide, presumably because of links with the presumed killer”.