Exactly, Pak said she changed into the boots when she got into his SUV.
Considering she likely left the ballet flats in the SUV (why carry them into Brewers?) then that begs TWO QUESTIONS. How did they get from MP's SUV and into the marsh? And, wouldn't it be even harder to get out of the tight fitting jeans when she was wearing BOOTS!!!
Now, the third Question: Where are the freakin' boots...were they still on her leg bones?
Really, that would be absurd. Taking the tight jeans off but not the BOOTS.
Here is the link to Michael Pak saying she changed into the boots.
http://www.newsday.com/news/breaking/gilbert-vanishing-reaches-one-year-mark-1.2849214
"...Gilbert, then 23 and working as a prostitute, police say, had come from Jersey City to set up appointments with men responding to her Craigslist ad.
At the corner of 32nd Street and 6th Avenue, she pulled out her cellphone and called her driver, Michael Pak, he said. It was 10:02 p.m.
Her mood was calm, Pak would later recall. "She sounded normal," he said. "Everything was OK. Inside Pak's SUV, Gilbert changed into dark leather boots and posted an ad on Craigslist, he said. By midnight, she was at her first appointment, a man in a nearby apartment, Pak said.
Over the next six hours, Gilbert's work would unexpectedly take her from the city to a secluded community on Long Island's South Shore, and by early the next morning, she had vanished..."