Good day, jeff here just stopped in to put my one cents worth in.
If your wondering about the three o:clock in the morning situation, we in the ghost world would call that the witching hour when the spirits of good and evil will do their major roaming within a haunted location.
The home that you were in I do believe was haunted and the haunt was that of your father-in-law, only because of the situation he was in, the location of his remains, and the fact that there was a new-born within the house.
Thank god you have moved to a different location, but be warned, (not trying to scare you) but if it wasn't the house that was haunted but instead you and your family, the entity will follow you were ever you may seek shelter.
Burning of the sage in all the crevases of your home will rid the house and your family of any ill faited spirits, but will not rid your home of the angle type spirits that you have seen (so called)
The angle type spirits are here (there) to help you with the situation that you hid in your past and that is the power to move things with your mind.
You were probably told as a young child not to do such things by an adult, or you were terrified that such a thing took place and you closed it in a small compartment in your mind and left it there until something happened that re-awokened the situation.
You need to find out from the home owner where you live (landlord, previous owners) if the house your in now had any time of haunted activity, (IT IS THE LAW that former tenants, realators must tell you if a home is to have haunts or spiritual activity.)
Be causious if you do any type of renovations to the new location, since this may bring up the spirits since your changing the structure of their home of the past.
Remember the witching hour of the haunts is from 12 midnight to about three in the morning and there are times you'll see things that are frightning, but if they do not harm you or your family, then you may be alright, but.
If any one begins to have their hair pulled, kicked, slapped, scratchede or anything like this, then you may be facing some we call a polterguist type haunting, there are also evil and demonic hauntings, that you need to watch out for.
Find yourself a good book on haunting and read it, then when your finish, read again, until you have the thing memorized,so that when something does show its self to you, you will automatically have an idea of what type of a haunt your facing.
My major study of the paranormal has been in the field of spirits and have been studying them and researching them for the past 37 years, a little longer than you've been alive.
Please contact me if you have any questions, and I will do my best to answer them for you.
A very serious JEFF