fall/slip through the cracks

to get lost or be forgotten, especially within a system.

It seems that important information given to the police may have fallen through the cracks.

• call in someone
• call into question
• call into question something
• call in your chips
• call it a day
• call it quits
• call names
• call off
• let in on something
• let it all hang out
• let it be known
• let it rip
• let it slide
• let nature take its course
• let off
• let off easy
• let off steam
• let off the hook
• let on
• let out
• let out something
• let ride
• let rip
• let's face it
• Let's get the show on the road.