So question for the law dogs, why weren't Brendan and Steve tried together? I mean, are they not both accused of the same crime?
I think if Brendan had Steve's attorneys he may have gotten off or at least a reduced sentence.
The government can choose how it wants to prosecute the case. You saw them present two different theories of the crime, so I think it's pretty clear why they chose to proceed as they did. Theoretically, Brendan's attorney could have filed a motion for joinder, but he was much more interested in getting his client to confess so that he could be on the government's side.
Besides, I'm not sure I'd want Brendan sitting at the table with me if I'm Steven Avery. It has its advantages and its disadvantages. Sure, we could show the jury the police misconduct during Brendan's alleged confessions, but there's also chance that they might believe his version of events. It's a tough call, but Steven's attorneys had no real say in the matter regardless.
As to your question about why Avery's attorneys didn't defend Brendan as well--You serious, Clark?
Like everyone else, attorneys don't work for free. You might think that these guys made a huge amount of money off of Avery's case, but you have to keep in mind that they hired support staff, experts, and an investigator. This case dominated their practice for months, if not longer, and they essentially abandoned the rest of their cases and lived in Manitowoc County for several weeks when the trial was ongoing. They earned every dime they were paid, and I'd be willing to bet that it wasn't some kind of windfall when all was said and done.
If you hire a carpenter to rebuild your deck and he notices that your roof is about to cave in, he's not going to offer to fix it for free just because he's passionate about his work. If you call B.B.d.K. for homeowner's insurance, he's not going to offer you a free life insurance policy because he cares about his clients.
The job of a defense attorney is somewhat different because emotions run high and the stakes are astronomical at times, but it's still a job. I doubt you'd let someone leave the ER with a life threatening condition they were unaware of, but you wouldn't perform some kind of invasive procedure without charging them for it.
It might seem callous, but it's unreasonable to expect these guys to work for free.