I'd like to share my experience, but not to condemn nor justify the parents at all. Not taking a "side". My son is 11. He has autism and adhd. He is very impulsive. He is a wonderer. He got out of our house one time, in our pretty wooded back yard, headed for my sisters house. I was sick, laying on the couch. He was 7 at the time (plus or minus 6 months). I had the worst migraine headache in the world. My head was pounding. The house felt quiet ... too quiet and I called for him. He is often styming, or humming, or making some sort of verbal sound and something just didn't feel right. I ran out the back door, along with my two black labs. Now mind you, our entire acre property was fenced in because my son has autism and we've known since he was 3 (and for the dogs). For whatever reason, kids with autism (in my experience) are drawn to water, so we've always had a fence. Anyhow, it was a particularly bad winter and a snow laden tree fell on one section of the chained link fence. It was there that he crossed over the fence. He was approximately 300 feet into the woods when I heard him answer to my frantic screams. I ran to him, bawling my eyes out and asked him just where was he going???!! He decided he was going to walk to my sisters, three miles away, since I was "sleeping"
Since that day we have had chimes put on every ground level window and door. And have had ADT installed. Not everyone can afford a monitored alarm system, but those chimes are $10 at a hardware store and are very loud. My two labs have since passed at the ages of 13 & 15 and we now have a german shepard that never leaves his side.
Yes he is a boy, yes he likes to explore and wonder, but never by himself. Just never ever know. Yes, I watch my son every waking minute. He has a disability and until I know he can fend for himself and function in this crazy world, myself or his dog will be right there.
Not saying DP had autism, but one further thing.... if he was just wondering down the street, sometimes kiddos with autism just don't "hear" you. My son can be so hyper-focused on things that you can be right next to him calling his name 20 times, and he won't hear you. Especially if he is trying to get something finished or accomplished.
Before you all think I am a crazy helicopter parent, I also have a 10 year old girl. She has a certain level of independence and is given more freedom.
Just wanted to share