CHARLOTTE N.Y. -- Nearly two weeks in and the efforts by the Monroe County Sheriff’s Office and loved ones continue.

The search has been extended for Robert Ross, 73 and his 72-year-old wife, Mary who have been missing since January 30th.

“You just hope for the best and we don’t know what the best is at this point,” said the son of missing couple, Robert Ross.

Sunday’s warm weather allowed the search to move underwater.

“Worst case scenario is maybe they drove into the water or something like that — there’s only certain access points you can get to with a vehicle,” Monroe County Sheriff Todd Baxter said.

With the assistance of Rochester police, the Sheriff's Office SCUBA team took to the Genesee River using underwater sonar equipment at the Port of Rochester Marina.

“Looks at a lateral view so you can see things in three-dimension," Baxter said. "Using that technology to our advantage, again, there’s no specific reason why we are up there besides that the phone was pinged in Charlotte and we are just going to do our due diligence."

Mary Ross’ cell phone pinged near Lake Avenue around 3 p.m. on January 31st, and with a drone and helicopter search on Friday and ground searches all throughout the weekend, the Sheriff’s Office says that there are still no clear answers to the couple’s whereabouts.

“There is no specific lead, leading us up there besides the ping on the phone a week ago," Baxter said.

Family friend Tom Lockwood says the search is very stressful.

“We get ups and downs, and we are getting hearings of hits on sightings and they are all being searched out, but right now, nothing has come forward,” said Lockwood.

The couple’s son, who came in from Boston, is trying his best to hold it together.

“I don’t know if I want them to be in the water that long,” says Robert. “Yesterday was gloomy. We talked, and we tried to make jokes because you try to keep your sanity. If you’re thinking — my dad is at the bottom of the lake someplace 24/7, there is no happiness there.”

The couple drives a white 2017 Kia Sorrento with New York plates reading “BLUSTERY.”

At this time no word of when the next search will be.