This part stands out to me:
"On the third floor, the suspect checks Goncalves' bedroom and wakes her dog. The suspect then proceeds Mogen's bedroom, killing Mogen and Goncalves."
If true, it assumes that
* KG might have been (one of the) target(s) - unless he initally planned to kill everyone from top to bottom
* He knew KG was home
* But he did not know, which bedroom she was at that night
* But he did know, that she might sleep in Ms room
If true - this kinda makes me feel more like his initial plan was to kill everyone (while he still might have had primary target(s), because it's hard for me to imagine a lot of scenarios where the conditions in that list would be filled.