The CU Boulder Police Department said Thursday they're working to locate a student who hasn't been seen since Sunday. They identified the missing person as Megan Trussell. A spokesperson for CUPD said based on information shared with them, the last known sighting of Trussell was Sunday, Feb. 9 in her residence hall. CUPD was contacted on Wednesday. She was last seen wearing a blue/gray jacket, dark-colored yoga-style pants, and white platform sneakers. Megan's mother and father, Vanessa Diaz and Joe Trussell, are nervous because their daughter has not been seen or heard from since Sunday around 9 p.m. Diaz said she last texted her daughter on Saturday evening making plans for a cousin's birthday party the following weekend. She said her daughter told her she was going to be hanging out with her boyfriend on Sunday. She said she didn't text her daughter again until Tuesday and the messages went unreplied, which wasn't unusual for a day, she said. By Wednesday, Megan's father texted Diaz and asked if she'd heard from their daughter and the two began to piece together something was wrong. "It's very unlike her to not be in contact," Megan's father Joe Trussell said. "She's she's very compassionate with her parents when it comes to keeping in touch. She understands that all we want is a text. So to not receive that from her is a red flag." Diaz said she checked her daughter's cell phone information online and found there had been no activity on her phone at all after 8:45 pm on Sunday. "There was no data, there's no data usage, which is very unlike her, because you could tell like she watches movies, because she's a film student, so she streams a lot of movies," Diaz said. "No outgoing texts, no outgoing phone calls, nothing." Diaz said her daughter was last seen on video heading in the direction of her sister's Boulder apartment. "She didn't go there," she said. "Her sister was there all night. Megan never arrived." Megan Trussell is a freshman film student at CU Boulder. She attended Northfield High School in Denver. "Megan is a very creative, sensitive, sweet person," her mother said. "We want her back so badly. I just have to be present because we're going to find her and we're going to bring her home."