Is it true that Jenna and someone else killed Ali?

Jenna & Garrett[the cop] killed Ali.
And it's not yet known who A is :)

not in the book

Jenna dosn't kill anybody but just read the 本 and find out if the Ali and Mona thing is true

No, I think because I'm not sure who killed her and Mona is -A because it's on YouTube when Aria 発言しました it ' it was a spoiler alert

No,Jenna didn't kill anyone and even though Ali acted rather cruel to her like many others but she didn't touch Ali and to me it's still mystery whether she is または isn't alive I'm still in the middle not even relatively sure what to believe in the 表示する and with the fact Mona is part of the A team didn't mean she touched anyone either would she have sent the texts? most likely but any other than that I don't think so that's what I think.

Actually Ali isn't dead. Her twin sister is. And yes Mona is part of the A Team. Alison is redcoat who is later introduced in the series.

You're asking about the show? just watch it. I don't get why people don't just watch the 表示する instead of asking pointless questions. But no, Jenna and Garret didn't kill Ali as she is still alive.