A few random ideas:
Karina's father wrote on 10/5/16:
"Good morning everyone.
On that day August 2 2016. The day my world came to an end. Someone was riding their bicycle around 164 ave and 83 st at exactly 5:23 pm. This person had a go pro camera running at the time . This person picked up a woman going in in the same exact location that Karina went in. Does anyone out there know who this person is . Please everyone ask around . this must be someone from new howard. Please contact me direct. It is very important".
I take from this that someone was riding a bike with a GoPro attached to the bike or a helmet and caught footage of a woman running into the park at the same spot Karina did that evening. Saying about that woman "this must be someone from new howard" is odd. How does he know? Are the Vetranos/Spring Creek Park part of "old Howard?" So does that mean he/friends/family would recognize someone not from that neighborhood?
Re MF: Today's Thursday, a few days past when NYPD said they'd be getting results on his DNA. No announcements either way. Quoting NBC Channel 4, a local news station, "NYPD Chief of Detectives Robert Boyce said ... that the department believes there is a 'severe community threat' after the killing of Vetrano..." What's the holdup on a case in which LE has said there was a public danger involved?
MF has been described in multiple news outlets as mentally or emotionally disturbed to the point of becoming psychotic that night he was found naked in the park. If my friend had a breakdown of some kind, drug-induced or not, and it could be proven that he had a rock-solid alibi concerning a recent murder, I'd go public with the injustice of the arrest, or I'd certainly expect the family to find an attorney to do that. NYPD said MF would be charged with "public lewdness" and "trespassing." If he was alone in a marsh that late, who is being offended by his lewdness, the cops? Considering how many celebrities flaunt their lewdness, why would this be announced as a charge? Quality of life crimes are squashed these days of the past in NYC. If this man is innocent, his name should be cleared ASAP.
Sounds like the delay means either they are really "liking" him for KV's murder, or else squeezing him for info about other crimes.