The Scottish Conservative leader says as part of a pilot in the north east of Scotland frontline officers are ignoring certain crimes.
Some victims of crime will report it to the police only to be told it is not important enough to investigate, he says.
"Which crimes won't be investigated?" he asks.
Holyrood marks the first anniversary of the death of the Queen
BBCCopyright: BBC
Before we get to FMQs party leaders will mark the first anniversary of the death of the Queen, which is tomorrow.
Queen Elizabeth II, the UK's longest-serving monarch, died at Balmoral aged 96, after reigning for 70 years.
She died peacefully at her Scottish estate, where she had spent much of the summer.
What's been in the headlines this week?
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Children currently get 1,140 hours of free childcare from three years old, but the first minister has vowed to expand this coverageImage caption: Children currently get 1,140 hours of free childcare from three years old, but the first minister has vowed to expand this coverage
Politics returned to Holyrood this week at full pace after the summer recess.
Humza Yousaf's programme for government has dominated proceedings.
Presiding Office Alison Johnstone will be watching the clockImage caption: Presiding Office Alison Johnstone will be watching the clock
One interesting element today may not be what questions
Humza Yousaf is asked, but how many.
Seasoned watchers of Holyrood sessions will be familiar
with the weary tones of the presiding officer pleading with members to keep
their questions and answers succinct.
For the new term, Alison Johnstone has put MSPs on the
clock in a bid to cut out waffling and allow more topics to be raised.
Members will get 45 seconds to ask a question; ministers
will get one minute to respond.
How robustly this is enforced remains to be seen, but a
shiny new clock has been installed in the chamber to underline when time is
running short.
If this results in four or five more members being called
per session, parliament officials reckon it could add up to 180 more questions
being asked across the year.
As ever there are no guarantees about the content of
contributions, but we can at least predict they will be a bit snappier.
Welcome
Getty ImagesCopyright: Getty Images
Humza Yousaf will field the questions during FMQs todayImage caption: Humza Yousaf will field the questions during FMQs today
Good morning and welcome to our live coverage of First Minister's Questions.
We'll bring you the action live from Holyrood, with updates and analysis.
FMQs gets under way at noon. You can watch live from the chamber by clicking the play icon at the top of this page.
Live Reporting
Edited by Calum Watson
All times stated are UK
'Which crimes won't be investigated?' - Ross
Douglas Ross gets to his feet and FMQs begins.
The Scottish Conservative leader says as part of a pilot in the north east of Scotland frontline officers are ignoring certain crimes.
Some victims of crime will report it to the police only to be told it is not important enough to investigate, he says.
"Which crimes won't be investigated?" he asks.
Holyrood marks the first anniversary of the death of the Queen
Before we get to FMQs party leaders will mark the first anniversary of the death of the Queen, which is tomorrow.
Queen Elizabeth II, the UK's longest-serving monarch, died at Balmoral aged 96, after reigning for 70 years.
She died peacefully at her Scottish estate, where she had spent much of the summer.
What's been in the headlines this week?
Politics returned to Holyrood this week at full pace after the summer recess.
Humza Yousaf's programme for government has dominated proceedings.
The first minister confirmed new measures to improve childcare in Scotland.
Mr Yousaf said the plan was "unashamedly anti-poverty and pro-growth".
Opposition leaders said it failed to address the major challenges Scotland faces.
Nicola Sturgeon backed her successor's plan to tackle child poverty as she made her first Holyrood speech since being arrested.
Yousaf also said his government would hold a consultation on a single-use vape ban as he set out his priorities for the coming year.
One other story has dominated the headlines across the UK and that is the potentially dangerous aerated concrete or RAAC.
Questions have been raised about the safety of some school buildings in Scotland after it emerged that more than 30 have been found to contain RAAC.
MSPs are on the clock today
Philip Sim
BBC Scotland political correspondent
One interesting element today may not be what questions Humza Yousaf is asked, but how many.
Seasoned watchers of Holyrood sessions will be familiar with the weary tones of the presiding officer pleading with members to keep their questions and answers succinct.
For the new term, Alison Johnstone has put MSPs on the clock in a bid to cut out waffling and allow more topics to be raised.
Members will get 45 seconds to ask a question; ministers will get one minute to respond.
How robustly this is enforced remains to be seen, but a shiny new clock has been installed in the chamber to underline when time is running short.
If this results in four or five more members being called per session, parliament officials reckon it could add up to 180 more questions being asked across the year.
As ever there are no guarantees about the content of contributions, but we can at least predict they will be a bit snappier.
Welcome
Good morning and welcome to our live coverage of First Minister's Questions.
We'll bring you the action live from Holyrood, with updates and analysis.
FMQs gets under way at noon. You can watch live from the chamber by clicking the play icon at the top of this page.