On the evening of Saturday, Feb. 7, a vibrant Millersville University freshman changed her Facebook profile to add a photo depicting herself nuzzled against her boyfriend. Hours later, the 18-year-old from Chadds Ford died at his hand, investigators said.

Now the communities impacted by the alleged murder, which include the Millersville campus as well as Unionville High, where Karlie Hall and her twin sister graduated in 2014, are struggling to cope with the loss. Counseling services have been provided for students in both locations.

Following Hall’s autopsy on Monday, the Lancaster County District Attorney’s Office added criminal homicide to the charges facing Gregorio Orrostieta, 19, of Kennett Square, Hall’s boyfriend. The coroner concluded that Hall died "as the result of strangulation and multiple traumatic injuries."

Police said Orrostieta called 9-1-1 at 5 a.m. on Sunday, about 2 ½ hours after the resident assistant in Hall’s Bard Hall dormitory followed up on concerns about yelling and sounds of an altercation in Room 217. The resident assistant got no response after knocking at the door, the criminal complaint said.

No one heard any further commotion until police arrived and found a bloodied Orrostieta kneeling over the body and attempting to administer CPR, Lancaster County District Attorney Craig Stedman said. Orrostieta told police that the two had argued at a party, made up, and then returned to Hall’s dorm, where another more physical argument occurred.

At the university,  a long white sheet of paper placed over three long tables between the Fitness Center and information desk with markers on Monday, Feb. 9, invited students to share written tributes to their classmate. Janet Kacskos, a Millersville University spokeswoman, said it was nearly devoid of empty space early afternoon on Tuesday, Feb. 10.

Kacskos said the remembrance banner would likely be hung in the student memorial center. A candlelight vigil, held on Monday, Feb. 9, attracted about 300 mourners, said Kacskos. “Everyone is feeling the grief,” she said, adding that therapy dogs have also been helping students cope with the death of Hall, a business administration major, who planned to pursue a concentration in management.

Sympathy messages abounded online, and a fund was set up to defray funeral costs at http://www.gofundme.com/karliesangels.

“Although there is nothing that anyone can do to bring this light back into the world, we can band together in support and help the Hall family during this time,” said a statement from Aisling Burns, a Millersville senior who set up the page.

The effort, which has raised more than $12,000 in less than a day, noted that the average funeral cost ranges from $7,000 to 10,000. Any amount raised beyond $10,000 would be donated to a Lancaster women's shelter and an animal shelter, Burns said.

Burns, an international relations major from Drexel Hill, said she didn't know Hall or her twin sister, who also attends Millersville, but that didn't matter.

"Millersville is such a small tight-knit community that even if you don't know someone, you know people who do; this hurts everyone," Burns said. "It occurred to me that this family was not prepared to bury their loved one, and I wanted to do something to help."

Burns said she contacted the university to make sure the Hall family would approve of her idea. She said once she got an OK, she set up the page, including quotes from Hall’s friends, who referenced attributes such as her contagious laugh and beautiful spirit. "Karlie had a smile that would brighten anyone's day. She was the sweetest girl I have ever met and a great friend. I will never forget her," wrote Tyler Bethke.

Ryan Kotzman said: "I will think of her everyday. Karlie was a good friend, the best, my best and I will miss every moment I don't have with her."

Burns said she was thrilled with the response and hoped it would continue. She said several campus organizations planned to make donations through efforts such as bake sales. "It's just been great," she said.

Kacskos said Millersville – a campus that had never been rocked by a homicide before – has united in its efforts to mourn the loss as well as assist Hall’s family. Kacskos said Millersville has helped publicize the funding website through tweets and other social media.

“The outpouring of support to the university has been amazing, with requests to pass condolences along to the family,” Kacskos said. “I’ve heard from universities across the country, and from businesses. It’s wonderful to see so many people with kind, loving spirits.”

As Hall’s friends and relatives mourn her loss, Orrostieta, a 2014 Kennett High student who did not attend Millersville, has been held at Lancaster County Prison. On Sunday, Feb. 8, he failed to post bail of $1.5 million for an aggravated assault charge. On Monday, Feb. 9, prosecutors added a criminal homicide charge so bail is no longer an option.

A preliminary hearing was scheduled for Feb. 19, court records said. Police asked anyone who might have information related to the investigation to contact them at 717-871-4357.