Omg the comments are moving so quickly
My thoughts in a nutshell: man's body (and statistically extremely low it's a woman - not going to get on my soap box about this but MOST violent crimes are done by men), oddly large eyes for a man - face seems like it could be easily recognizable to someone who knows him. He could have taken concealing measures such as changing facial hair grooming, dying, etc.
Clothing is largely unremarkable. Stated he has a gun in his waistband? I didn't see that confirmed.
From the info on the post it says it's from "the morning of her disappearance" - meaning 2am, or like the morning of the dinner? I'm assuming 2am the day she disappeared but may be worth clarifying.
LE didn't have these images until today it sounds like; I wonder if they had any other info that would lead to this "sort of" person being involved, or if this is a totally new direction.
Given the gun, the knowledge of the camera locations, etc. I'm leaning toward pre-planned, definitely, possibly hired by someone else. Motive still unclear.
Photos are creepy AF. Poor Nancy. I hope they find this guy...