Yvette Cooper has launched a blistering attack on Suella Braverman - telling MPs: "I don't really know what she does."
The shadow Home Secretary urged her Tory counterpart to "get out of the way and let somebody else do the job" as she lashed out over the government's crime failings.
Ms Braverman sheepishly grinned as the Labour frontbencher said she "doesn't get let out much" and branded her "the shadow of a Home Secretary".
Latest Home Office figures show that the overall charge rate for all types of crime stands at just 5.5% - while for rape it is just 1.6% and for criminal damage and arson it stands at a lowly 3.9%.
A Labour motion criticising the Tory "decimation" of neighbourhood policing and calling for an increase in officers patrolling the streets was voted down.
Ms Cooper told MPs in the Commons: "It's good to see the Home Secretary here today because we don't see her that much and, if I'm honest, I don't really know what she does."
She said that many duties that a Home Secretary would be expected to take responsibility for had been passed over to other cabinet members.
"The DLUHC Secretary (Michael Gove) has been put in charge of doing anti-social behaviour," Ms Cooper told the Commons.
"The Prime Minister has taken charge on small boats. The navy has been in charge of patrolling the Channel - it didn't work, did it? No."
She added that Mr Gove has taken on the Prevent review and running Homes for Ukraine, while Education Secretary Gillian Keegan and Work and Pensions Secretary Mel Stride were running legal migration police.
Immigration minister Robert Jenrick is running asylum accomodation "because when the Home Secretary was in charge she broke the law", Ms Cooper continued, adding: "The security minister (Tom Tugendhat) has taken over security policy because she can't be trusted not to leak."
Continuing her scathing criticism Ms Cooper said: "She's not charging criminals because that's got worse, in fact the number of prosecutions fell by 20% when the Home Secretary was the attorney general. She's not sorting out the Windrush scandal because she's cancelled all of that.
"She's not doing work on police standards, tackling misogyny or racism or violence against women and girls because she thinks all of that is woke.
"All of that fuss about the sacking this week of the member for Stratford as the Tory party chair and minister without portfolio ( Nadhim Zahawi ), the real minister without portfolio is still in office.
"She doesn't get let out much, she doesn't even do TV or radio interviews, I don't think we've heard her in the morning for months or on a Sunday for months.
"Because she is the shadow of a home secretary. She is a shadow shadow home secretary, so why doesn't she just get out of the way and let somebody else do the job?"
The Home Secretary branded Ms Cooper's speech "really worthy of an Oscar", adding: "I think she's strong on alarmism, strong on hysteria, a little weak on facts."
She went on: "They're (Labour) on the side of the eco-zealots, in the pockets of the militants and they don't care about the law-abiding majority."
Ms Braverman said the government is "on track" to recruit 20,000 new police officers by the end of March.
MPs rejected Labour's Opposition Day motion by 309 to 195 - a majority of 114.
Labour's motion sought to condemn ministers for the "destruction of neighbourhood policing" and the "collapse in charges and prosecutions across all types of crime", and called on the Government to increase the number of police officers patrolling the streets across Wales and England.
MPs approved a Government-backed amendment to Labour's motion, backing it 308 to one, majority 307.
The Government amendment struck out most of Labour's condemnation of policing, replacing it with a message welcoming ministers' efforts to shore up police recruitment and to address serious crime.
