that we‘re less of a priority when our suspects can‘t re -offend for a whole month

[Petrushka]

Пожалуйста, помогите перевести.

Выражение встречается в следующем контексте:

Ally speaks first. 'Look, the number will be on the shelter's phone bill. You can run it through the police and find out who he called if you want to know. It'll just take a few weeks, thats all.' He sounds like he's trying to make amends.
'Yeah.Look, I'm sorry.' He's right. A policeman once told me to my face that we're less of a priority when our suspects can't re - offend for a whole month. Still I can get it started.

I'm not able to understand the sense of this sentence :(

Заранее спасибо