The Weltall File - David Weber - Bog

"The Weltall Tournament's professional VR games were supposed to be a symbol of cooperation between SysGov and its militaristic neighbor, the Admin. But that was before star Admin player Elly Sako received a death threat, written in blood next to a copy of her own severed head. The Admin's Department of Temporal Investigation swiftly seizes control of the crime scene, and the tournament transforms into a flashpoint of charged politics and conflicting jurisdictions. SysPol Detective Isaac Cho and DTI Special Agent Susan Cantrell--partners in the officer exchange program--are sent in to take charge of the investigation and bring the situation under control. But solving this mystery won't be easy, and the pair struggles to determine who is telling the truth. A jilted relationship between players soon explodes into signs of a far-reaching conspiracy, and the two detectives find themselves racing against time before the tournament ends. Because the killer will be the only one who wins, should they fail"--