Search on for University of California, Davis freshman The father of a 19-year-old University of California, Davis freshman is asking for the public's help in finding his daughter who walked away from a mental health center in Sacramento 10 days ago. Courtesy Lomax family Linnea Lomax, 19, was last seen on June 26, 2012. Police say Linnea Lomax was last seen at 1 p.m. on June 26, leaving an outpatient therapy center off Howe Avenue in Sacramento. Craig Lomax said his daughter had lost weight, had a nervous breakdown during finals and was under psychiatric care. The Sacramento County Sheriff's Department said Lomax is considered missing and at-risk due to her disappearance being "inconsistent with her normal behavior patterns." She doesn't have her wallet or cell phone, Craig Lomax said. She had been prescribed medication for anxiety and depression, but she left her drugs behind, vanishing into California's capital, he said. "This is as miserable as life gets," Lomax told msnbc.com on Friday. We just want her back and we're not giving up. Craig Lomax said his family has been fraught with anxiety and fear, trying to ferret out tips and leads. He said dozens of volunteers have been out looking for the teen. Volunteers have created a command center near the area she was last seen. They have canvassed a 5-mile radius from near Discovery Park and the surrounding Sacramento River area. He said volunteers have set up log books and maps trying to find Linnea Lomax. "We have maps with different strategies, there are pins and strings and all kinds of things that range from her being in the bushes, a pleasant apartment to human trafficking," he said. The family has also hired a private investigator to help find Linnea Lomax. "She's very much at risk," Frank Roman, the family's investigator, told msnbc.com on Thursday. Her mental health issues make her even more vulnerable. She graduated from El Dorado High School in Placerville, Calif., in 2011 and had completed her first year at UC Davis. Her father said she has a 4.0 grade-point average and was studying human development, with plans to pursue a degree in nursing. "She is a beautiful young woman and worthy of everyone dropping everything to search for her," said Julie Warren, a family friend. "We are terribly concerned for Linnea's safety and for her family," said Barry Shiller, interim director of communications for UC Davis on Thursday. It's heartbreaking and we're all hoping this ends well. Lomax was described as 5-feet-2-inches tall and weighing about 100 pounds. She has long, blond curly hair and blue eyes. She was last seen wearing green skinny jeans and a black hooded sweatshirt with the word "Sweden" written in red. She wore black flip flops. Anyone with information is asked to contact the Sacramento County Sheriff's Department at 916-874-5115, or 916-905-HELP. Online accounts also have been created at Facebook.com/HelpFindLinnea or at HelpFindLinnea.org.