According to the Delphi Community High School calendar for 2016-2017, the school had Friday 2/10 and Monday 2/13 off for the same reason "Winter Break, No School or Make Up Day." So, when I was in school, they had what we used to call a four-day weekend. The following Monday, 2/20, was in fact President's Day--a federal holiday--but oddly: DCHS doesn't appear to have had this day off.
Online school calendars--and other school information which can be found online--is, to me, a double-edged sword. It's quite common now and has been for many years, to find massive amounts of school information online. This (like many things) is a great convenience for many, but not necessarily limited to only those with good intentions.
I'm in California and located this calendar, my point being: whether someone is tech-savvy or not: it's difficult if not impossible to keep information limited to only people with good intentions. The Iowa case (Lizzie and Lyric) has so many similarities to the Abby-Libby case that even if they're not connected to the same killer(s), it wouldn't surprise me a bit if BG studied that case prior to committing the Delphi murders. This doesn't speak to high intelligence nor intellect to my mind, but simply some amount of common sense and SELF-preservation.
I think it's absolutely evident that BG has zero regard for human life except for his own. Therefor: I think BG and others like him will research whatever helps them to avoid being caught. IMO some killers actually enjoy the planning stage almost as much as the crime itself, and I don't think it's unlikely that their "confidence level" increases accordingly relative to the amount of time they remain free.
I'm convinced BG is already a SK, or at least: well on his way to becoming one. I honestly see no way of keeping information which can be helpful to most people out of the reach of those with bad intentions. One of the ways we can better protect ourselves and our loved ones is by knowing this to be true.
In a perfect world, there would be no evil--but in this world: maybe the only thing we can really do is know that bad things can happen anywhere and to anyone. Never take safety for granted but never stop living life to it's fullest. Be vigilant but not hyper-vigilant. Educate ourselves and our loved ones and have more free classes, workshops, and safety awareness info available to everyone.
All of us need to work together to keep evil from winning. Never be afraid to speak out, alert others, if something appears "off." You aren't crazy and your instincts aren't lying to you. That one phone call you make call literally be the call that saves another's life.
I never thought evil would enter my own life and a man would attempt to murder me in my own home--that's the stuff of tv shows, that only happens to other people....I fully believed I was safe from the stuff of horror movies. I fought like he** and screamed until I had no voice left. This happened in broad daylight and I could not call 911--he broke three phones. I just happened to get lucky, a man over a block away from my home had heard my screams and flagged-down a passing patrol car. I have some permanent physical issues and PTSD and am working on improving every day.
Please just never assume "It can't happen to me." You have the right to tell friends and neighbors you won't open your door unless you're expecting company! You have an obligation, even, to look like you're mad by setting some reasonable safety boundaries! Never live in fear, but never take anyone's safety for granted.
I just want to say, lastly, that my words here are in no way intended to cast blame or say that anyone has been negligent when evil things happen. After all, it's not a perfect world and sometimes: evil does win. BUT: only temporarily.