An MP investigating the death of Dr David Kelly claims his computer files have been remotely wiped.
Lord Hutton found that Dr Kelly had committed suicide
Norman Baker, Lewes Lib Dem MP, has reported the matter to Sussex Police.
Mr Baker told the BBC he had medical evidence that it was "clinically impossible" for Dr Kelly to have died the way that was described.
He declined to comment on the police inquiry into the missing computer files, but confirmed he had contacted an assistant chief constable of Sussex.
The files were on a computer in Mr Baker's constituency office.
Dr Kelly was found dead after being named as the possible source of a BBC story on the government's Iraq dossier.
In May, Mr Baker said he gave up his frontbench role to investigate "unanswered questions" about the death of the weapons scientist.
He said the 2003 Hutton inquiry had "blatantly failed to get to the bottom of matters" and vowed to quiz ministers and unearth new facts to establish the truth of the case.
In an exclusive interview with BBC South East Today on Thursday, Mr Baker said: "What my investigations to date have demonstrated is that there are significant medical doubts from experts and professional medical people about the alleged cause of death.
"Indeed there are a number of specialist medical experts who tell me that it is clinically impossible for Dr David Kelly to have died the way that was described
"I am suggesting the explanation for suicide simply doesn't add up."