Not sure about hodo in this sentence

(Name)って人を殺してるって話だし信用できるほど僕たち彼のこと知らないでしょ。

I understand this as: "He (Name) said that he killed someone. I can somewhat believe it because we don't know anything about him."

I'm not very sure about the 信用できるほど part. That means we can do something (believe) to a certain extent? Did I translate this correctly? Or is there a better way to translate it?

Context: Someone brought up the story that (Name) killed someone before, which he admitted. Now he's in trouble and a guy (not among the ones who brought this up) says this about him.

Thanks in advance!

- I’ve heard (name) killed someone, and we don’t know him enough to trust him, right?

…って話だし = I hear, I’ve heard that…
信用できるほど = enough to trust (him)

Written with particles and punctuation to help easier understanding:
(Name)って人を殺してるという話だし、（彼を）信用できるほど　僕たちは　彼のことを　知らないでしょう。

100-percent agree with AK's translation.

The sentence is a little hard to parse, since it's cramming a lot of information into a single sentence. If your native language is English, it might be a little easier to see how the parts fit together if you mentally rearrange
信用できるほど僕たち彼のこと知らない
to
僕たちは彼のことを信用できるほど知らない


might be a little easier to understand if you


(Name)って人を殺してるって話だし信用できるほど僕たち彼のこと知らないでしょ。

For this case, it sounds better to learn ほど and ない together as a collocation.

JP
: S1がdo (A)するほど（には）S2がdo(B)しない
EN
: S2 do not (B) to the extent that S1 do (A)
= S2 do not (B) so much that S1 do (A)
= S2 do not (B) enough for S1 to do (A)

JP
: 信用できるほど僕たち彼のこと知らない。
= 僕たちが彼を信用できるほどには僕たちが彼のことを知らない。
EN
: We do not know him to the extent that we can trust him.
= We do not know him so much that we can trust him.

JP
: あすは雪が積もるほどには寒くならないだろう。
EN
: Tomorrow it would not get cold to the extent that snow accumulates.
= Tomorrow it would not get so cold that snow accumulates.
= Tomorrow it would not get cold enough for snow to accumulate.