Writer CPS Question for Fictional Story

Because this situation is so specific I'm having a hard time finding research on it, so I'm hoping someone can help or point me toward something I could read or watch.

So, both parents die (at the same time), leaving five siblings in Massachusetts aged 18, 16, 14, 14, and 7. They don't have any family. The eldest wants to take care of his siblings and has inherited his parent's money, but because he had been in college he needs to quickly find a job. Would he recieve custody of his siblings, or would he have to fight for them? It would be a background issue (I'm following the 14-year-olds) but I need to know what's happening so I can allude to it. What would the timeline be? Would CPS take the kids immediately or would they try to work with the oldest? Would the kids eventually need to show up in court or is it all up to the oldest? Is there anything somewhat like this that I could read or watch that could help me out? Feel free to ask any questions. Thank you!