NEWPORT NEWS, Va. (WVEC) -- A mother is trying to stay positive as police search for her daughter and granddaughter.

Keir and Chloe Johnson disappeared April 30. The next day, Kier's family filed a missing persons report.

On May 10, billboards popped up around Hampton Roads, asking for help in the case. One day later, state police issued an Amber Alert for little Chloe.

On May 14, Newport News Police found the car Keir was believed to be driving when she disappeared.

May 18, the amber alert ended.

On Wednesday, Newport News police gave an update on the search.

Newport News Police Chief Richard Myers released very few details during a press briefing Wednesday morning. Chief Myers said they are at a very critical phase of the investigation and it's too important for them to jeopardize. Chief Myers issued a call to action.

“Their family deserves answers and to know where they are,” Chief Myers says. “We know there are people who know where they are and we need to hear from you.”

19 investigators from six different divisions of the police department are working the case. Investigators have logged hundreds of hours on this case since May.

Rhonda Crews still searching for answers in her daughter and granddaughter's disappearance. She spoke to 13News Now Wednesday, pleading with the public to help bring Keir and Chloe home.

“I’ve never known for her to be gone this long,” Crews says. “I have faith one day she will come home and it will be soon.”

Chief Myers says due to the sensitive stage they are at in the investigation he wouldn’t be answering questions about the case.

Investigators are working with local, state and licensed federal partners.

If you have any information about the whereabouts of Keir and Chloe call the Crime Line at 1-888-LOCK-U-UP.