There is a very real phenomena that I've seen many, many times called "Bigfoot on the Brain". This is when someone who gets the bug, all of a sudden every seemingly innocuous event is done by a sasquatch. Prime example is Les Stroud. On one of his Bigfoot episodes, I believe he is out in Alaska where he has been many times before with no qualms about bears or anything else. In this instance, he hears a tree go down not too far from his location and he literally says "I may need to leave." I was quite shocked to hear him actually say that. This was a guy that made his living being alone in the woods and a natural event made him contemplate packing his bag and heading out.
Our group basically preaches something we call the Sasquatch Mantra and it essentially goes like this. Every cluster of dead branches isn't done by sasquatch. Every noise at night isn't a sasquatch. Etc., meaning that we need to attribute what we see and hear and experience to everything else, before jumping to the conclusion it was done by a sasquatch. Sasquatch is literally the last one on the long list of items that could have done it.
In this particular case, the concept of a squatch moving relatively close to the third largest city in the US is not impossible, but let's examine the evidence. Ravens are capable of making noises that sound like wood knocks, but they only make them during the day. They don't do it once the sun goes down. That begs the question, when did you hear it? Also, foxes and owls make some really varying array of sounds one wouldn't expect to come from their them.
Would a squatch venture close to a heavily populated urban center, maybe. It's consistent with follow the food supply so depending on what's available, it's possible a young squatch may come closer if there is adequate cover and ample sustenance. With that said, while it's plausible, I also don't believe it's practical for a squatch to markedly increase it's risk of being discovered by coming so close to more and more humans. I personally believe squatches number one rule is not to be seen. Although there might be adequate food close to a city, there is also much more food away from it. There isn't a driving need to get close.
Who knows. You may have a teenager rebelling against his mom and dad squatch, doing something to **** them off. Going back to the mantra though, make it the last possible answer, not the first.