He gave walts name and family info to the first two dealers (think they were tucos boys)
Edit:may not have been the first episode, but it was prob one of the first 3
Oh. It was the first ep. Him giving them Walt's info wasn't the problem though. Krazy 8 and Emilio asked Jesse "where did you get this dope?" and Jesse took them to Walt. Krazy 8 was about to make the deal but Emilio recognized Walt from the drug bust Hank took him to.
I thought you meant Jesse went to the cops or something in the first ep. I was like

Technically Walt threatened to snitch on Jesse first, in the very first ep. So I thought you was talking about Walt.
Fred.

All Walt did was help him make money and save his life a few times after his silly ass flew off the handle. It's his fault his relationship with mom and dad was fukked up. He got his ass beat for trying to be hard and the slave shyt was a result of him being a snitch. He's the one who got goth girl to doing drugs again which eventually led to her demise. He met old girl and her son in the NA sessions that that he was trying to use as a means of finding customers.
Pretty much everything that happened to him and those around him was a result of bad choices, or trying to be hard when he really wasn't bout that life.
