A Birmingham MP is defending senior Tory Damian Green after a former Scotland Yard detective told BBC News he was "shocked" by the amount of pornography viewed on a computer seized from the Commons office of Mr Green.
Neil Lewis examined the device during a 2008 inquiry into government leaks and has not spoken publicly before.
He said "thousands" of thumbnail images of legal pornography were on it.
Mr Green, Theresa May's deputy, has said he never watched or downloaded pornography on the computer.
Fellow Tory MP Andrew Mitchell, who represents Sutton Coldfield, defended Mr Green on BBC Radio 4's Today programme, saying: "It is the misuse of entirely legal information to blacken the name of a serving cabinet minister."