I'd like to know how the police (at the time) viewed the delay in filing the report. I guess the family could have been giving the situation the benefit of the doubt and didn't want to involve the police, despite that it was contradictory to the notion that it was apparently against Johnnie's character/routine to just take off.
I would imagine that the family would search any place, no matter how remote the possibility. As far as skid row, they would surely have known that Johnnie would have had no means of getting by. Regardless, I think they were just looking anywhere to try to find him.
I think there could be reasonable explanations for these things that might appear odd.
In other words, I think these things could appear odd because there's a lot we don't know.
I'm curious. Where did you get the info that the brother didn't go to the party?
I think it would have stated if the brother was at the party as well, and since it doesn't, I personally feel it's safe to assume that he wasn't in attendance.
The reason I'm suspicious about the party is because at no time have I ever found anything that explicitly states the Johnnie actually LEFT the party that night. Being seen attending a party is very different than being seen leaving the party. So for all we know at this point, Johnnie may never have left that house on the 700 block of W. Cedar St. (where the party was held) alive.