What is this use of アリだ?


[![enter image description
here](https://i.stack.imgur.com/NIl1u.png)](https://i.stack.imgur.com/NIl1u.png)

My understand of the sentence is

SWAMが悪い(...)のに he's essentially saying "Despite the fact the SWAM are the ones
that failed"

話をすり替えやがって they had the nerve of changing the subject

俺たちに虐待の疑いアリだってガサ入れするって

I took it "They said they'll raid us over the suspect of us committing
"虐待の疑い".

Which put together the jailer is saying "The SWAM group is the one that
failed, but they change the topic and said they'll house search us over the
fact we may have committed abuse".

What is the actual grammar of 疑いアリだって?




アリだ is gramatically a combination of noun あり (which is verb ある nominalized by
masu-stem) and auxiliary verb だ. あり/なし are often employed as if they are
suffixes (i.e. without particle right before) in order to express
presence/absence, like 在庫あり/なし, 可能性あり/なし, 才能あり/なし. However, when it is
followed by だ, there is little difference between ありだ and ある.




アリだ is gramatically a combination of noun あり (which is verb ある nominalized by
masu-stem) and auxiliary verb だ. あり/なし are often employed as if they are
suffixes (i.e. without particle right before) in order to express
presence/absence, like 在庫あり/なし, 可能性あり/なし, 才能あり/なし. However, when it is
followed by だ, there is little difference between ありだ and ある.

