Kayla Campbell, missing teen from Mint Hill, NC. (Photo: WCNC)
(WCNC) -- Crews returned to a Mint Hill, N.C. pond Wednesday afternoon, continuing to search for missing 16-year-old Kayla Campbell.
Officials began draining the pond around 1 p.m. hoping to find evidence leading to Campbell.
On Monday morning divers with Mint Hill police and the Charlotte Fire Department found the missing teen's cell phone, bicycle and bike helmet.
The Mecklenburg County Sheriff's Department K-9 unit joined other crews in the search Wednesday.
The girl's father says his daughter was last seen at the family's home around 2:30 Sunday afternoon.
Kayla is described as 5-foot-6, weighing 115 pounds, with long brown hair and blue eyes.
A seven to eight square mile radius between Bartlett, Glenn Croft and the Summerwood subdivisions, near Kayla's home, has been thoroughly searched, police said Tuesday, and no new evidence was found to assist investigators.
Campbell and her family live about a quarter-mile from the pond.
Early Tuesday afternoon, the Mint Hill Police Department notified the National Center for Missing and Exploited Children, and a Silver Alert was issued statewide for Kayla. Authorities added that although the Silver Alert initially indicated Kayla suffered from Dementia, that report is absolutely false.
Kayla's parents told NBC Charlotte that she suffers from depression.
When asked if they were worried if Kayla may hurt herself, Mint Hill Police Lt. John Rowell said, "We really don't have one main concern. Our main concern is to find her safe again, we're leaving all other possibilities open."