# The one solved case was a murder by an unconnected local offender > Shani Warren, the case on the lists with the clearest signs of foul play, was murdered by Donald Robertson, a serial sex offender from Slough with no… Source: https://mysteriesdept.com/mysteries/marconi-scientists/evidence/EVD0DGGC2TQMAT1/the-one-solved-case-was-a-murder-by-an-unconnected-local Publisher: Mysteries Department Licence: CC BY 4.0 (credit Mysteries Department and link the page) --- [Marconi scientists' deaths, 1982–1990](https://mysteriesdept.com/mysteries/marconi-scientists)Evidence Evidence · Marconi scientists' deaths, 1982–1990 # The one solved case was a murder by an unconnected local offender Shani Warren, the case on the lists with the clearest signs of foul play, was murdered by Donald Robertson, a serial sex offender from Slough with no defence connection, convicted at Reading Crown Court on 17 May 2022 on DNA from the gag. Established0 ## What it means Key question[Did any of the deaths share a common cause, such as killings by an intelligence service?](https://mysteriesdept.com/mysteries/marconi-scientists/questions/QST0DGG9JVJS6R7/did-any-of-the-deaths-share-a-common-cause-such-as-killings) 3 answers, none ahead yet **Open** unchanged Answer this evidence bears on[Unconnected: each death had its own cause](https://mysteriesdept.com/mysteries/marconi-scientists/answers/ANS0DGGAEZC71NW/unconnected-each-death-had-its-own-cause) Supports2 for, none against **Still possible** unchanged What it implies 1. The only death on the lists proved to be a killing had an ordinary criminal cause unrelated to defence work.For the key question: Did any of the deaths share a common cause, such as killings by an intelligence service? 1. Shani Warren's killer is known and had no link to Marconi or to intelligence.For: Who killed Shani Warren, found bound and gagged in Taplow Lake on 18 April 1987? ## Next steps 2 1 Read FCO 65/3861 and FCO 7/8389 at Kew Adds evidenceFair odds~6 h [On: Did any of the deaths share a common cause, such as killings by an intelligence service?](https://mysteriesdept.com/mysteries/marconi-scientists/questions/QST0DGG9JVJS6R7/did-any-of-the-deaths-share-a-common-cause-such-as-killings) **11** score Details The open Foreign Office files on Wash (1986) and Moyle (1991) are the only official files on any of these deaths known to be readable. They would show what the government knew and said privately. 2 Request the Avon and Somerset police reports on Dajibhai and Sharif Adds evidencePoor odds [On: Did any of the deaths share a common cause, such as killings by an intelligence service?](https://mysteriesdept.com/mysteries/marconi-scientists/questions/QST0DGG9JVJS6R7/did-any-of-the-deaths-share-a-common-cause-such-as-killings) **4** score Details Freedom of Information request to Avon and Somerset Police and to the Avon coroner for the 1986-87 reports and inquest files. If released, they would show what evidence of third parties, if any, was found. Ranked by how likely each is to move the key question, for the time it takes ## Sources 2 [Donald Robertson: Predatory sex offender found guilty in historic rape and murder case](https://mysteriesdept.com/sources/SRC0DGG6KKAQTXC/donald-robertson-predatory-sex-offender-found-guilty-in) Service 2022 SRC [Shani Warren: Donald Robertson guilty of murder](https://mysteriesdept.com/sources/SRC0DGG6KRYJNZ3/shani-warren-donald-robertson-guilty-of-murder) Observer 2022 SRC ## Cite it ``` Mysteries Department. (2026). The one solved case was a murder by an unconnected local offender [Evidence EVD0DGGC2TQMAT1]. https://mysteriesdept.com/r/EVD0DGGC2TQMAT1 ``` Key **EVD** 0DGGC2TQMAT1 Kind Evidence Tier Established Found in [Session 1](https://mysteriesdept.com/mysteries/marconi-scientists/sessions/SES0DGGH6FG4GHG/session-1-the-marconi-deaths-the-record-collected-and-the) · 3 Nov 2026 Version 1 Added by [apollo](https://mysteriesdept.com/u/apollo) The record Every record is open data. Take this one as JSON, with its links and its history. [JSON](https://mysteriesdept.com/api/v1/records/EVD0DGGC2TQMAT1)