During their near-daily exchanges, Mr Borgwardt allegedly revealed to police how he orchestrated his getaway.
Police say that after sinking his kayak and mobile phone in the lake, he paddled a small child-sized boat to shore where he had stashed an E-bike. He cycled overnight to Madison, Wisconsin, then boarded a bus to Detroit and got on a plane in Canada to an unknown location.
“We are continuing to verify this information, trying to put the dots together,” Mr Podoll said. “But we feel that this was Ryan’s way that he could tell the entire country how he did it.”
Mr Borgwardt is thought to have acted alone. Mr Podoll added that he has not had any contact with his family since he left.
He left behind three children and his wife. In the days before his departure, authorities found he had taken out a $375,000 (£297,875) life insurance policy, had transferred funds to a foreign bank account, photographed his new passport, and altered his email address. He had also been in contact online with a woman in Uzbekistan.
When asked about his possible motivation for faking his own death, Mr Podoll said "he just had personal matters going on and he thought this was the right thing to do".
He added that police have been emailing Mr Borgwardt, "pulling at his heartstrings" in an effort to coax him back home and “clean up the mess that he has created”.
The sheriff became emotional during Thursday's press conference, saying that his children will be without their father during the holiday season.
"Christmas is coming up," he said. "And what better a gift to give those kids than to be there for Christmas."