"[We] are aggressively investigating everything," Sgt. Tom Nestor of the Pinellas County Sheriff's Office in Florida told AOL News. "Are [we] closer than the day this first happened? Absolutely."
On Thursday, authorities searched the Indian Rocks Beach condo that Rothwell and Perry share. The search warrant has been sealed by a judge, but a source close to the investigation told AOL News that a forensic team was sent to the condo to look for potential evidence.
Rothwell, 35, was last seen on March 12 when she left a restaurant in Clearwater, Fla., with her friend Donna Scharett.
"We had lunch together at Chili's restaurant, and, about 3:30 p.m., said goodbye in the parking lot," Scharett told AOL News last week. "That's the last time anyone heard [from] her."
Speaking with Nancy Grace on Wednesday, Ken Williamson, a neighbor who lives below the couple's condo, said his wife heard a series of loud noises coming from above them after Rothwell returned from her lunch date.
"Mary, my wife, was inside at the time," Williamson said. "It was probably around -- oh, sometime around 4 on the 12th, and she heard a series of loud thuds up above the ceiling where our bedroom is directly below their master bedroom. And somebody, like, threw something heavy on the floor three or four times. And then it got real quiet, and then a short time after that, we heard Dave up there vacuuming."
Scharett called police on March 13 and asked them to check on Rothwell after mutual friends told her she had failed to show up for a planned get-together. When deputies arrived at the condo, there was no sign of the couple and both their cars were gone. Later that day, deputies found Rothwell's green 2007 Subaru Outback abandoned on a street about two miles south of her home.
Detectives also found Perry, 46, who had left Florida for New York. Last week, authorities said he was "not cooperative." Today, Nestor said he was offering "extremely selective and limited" cooperation.
"He had an attorney go to the local New York State Police barracks and give a verbal timeline of a three-hour window on the day that Kelly disappeared," Nestor said. "[Perry] has not spoken to us and this attorney has not spoken to us."
"Perry consensually surrendered his vehicle to the New York State Police for a search, and that search is continuing. He never gave a statement. He didn't speak to them. He just gave them his car, and that was it. I am not sure why he is not talking to us," Nestor said.
Authorities have not named a suspect in Rothwell's disappearance. Asked today whether Perry is considered a person of interest, Nestor said his department does not use that term.
"We just call people suspects or witnesses, and, at this point, he is still a witness because we don't have evidence of a crime," he said, adding, "although we do suspect foul play."