As for jury selection,
Well, we know that the judge isn't buying it, he denied bail in spite of all the letters he received from family and friends making that argument, stating that NM could be a danger to the community. Doesn't sound like he believed this to be a family protection issue only.
It does appear that way, but judge is not the ultimate decider. In the end, I think a
"desperate big bro protects little sis from drugs- yes, the victim had been asked politely" argument could find traction amongst the right jury.
There are plenty of cultures in the Bay area where brothers are expected to be naturally protective of sisters- even if the brother is, well..."imperfect" himself.
The trick would be to seat individuals sympathetic to the argument on the jury. "Racehorse Haynes", an ubber skilled defensive attorney from a generation or two ago emphasized his success was bringing the right argument to a very carefully selected jury.
Today, I would have 16 year olds on my staff with instructions to social media data mine the following 300 people appearing for jury duty that day. The mined date would then be screened for direct and indirect indications of "A", "B" and "C".