In the season finale of Silicon Valley, they show Pied Piper's former investor, Laurie Bream in prison. Why did she go to prison?
It is deliberately left unexplained by the show creators [to possibly give her character a comical/amusing end].
In an interview with TVLine, executive producer Alec Berg, who wrote and directed the last episode of the series, had the following to say in relation to Laurie Bream's imprisonment:
TVLINE | Laurie Bream is in prison. What did they get her for in the end?
That was a deliberate decision to [not reveal what landed here in jail]. The one conversation we had to have about what she [was convicted of was related to] what she was wearing. In minimum security prisons people wear tan jumpsuits. And in medium and high security [prisons] they wear orange [jumpsuits]. I got a call from the wardrobe people [asking], “What did Laurie get convicted of?” Ultimately, it came down to orange because I think it’s funnier. Whatever she did it merited an orange jumpsuit.