On Monday, Brandon Clark pleaded guilty to murdering 17-year-old influencer Bianca Devins on July 14, 2019, which marks a stark turn in the case.

Clark pleaded guilty to second-degree murder in Oneida County Court, according to Oneida County District Attorney Scott McNamara, the Syracuse Post Standard reports. This was done with the understanding that he would receive the maximum sentence of 25 years to life. This development was a surprising turn due to the fact that Clark had previously pleaded not guilty and was expected to go to trial later this month.

On July 13, the night before the murder, Clark and Devins had gone to a concert together in Queens after meeting on an app. The two, who had reportedly known each other for two months beforehand, are believed to have argued after leaving the event.

The initial disagreement was said to revolve around Clark's jealousy after leaving the New York City concert due to the fact that Devins allegedly kissed someone else while attending the show. Friends and family state that Clark and Devins had never been romantically involved. However, Clark himself had reportedly referred to her as his girlfriend on prior occasions, as reported by Crime Online.

As the conversation escalated, Clark is believed to have pulled over onto a side street and killed the teenager.

Prior to the crime, Clark had posted concerning messages to his social media, including one that read, "Here comes Hell. It's redemption, right?" The admitted murderer had additionally posted other disturbing images on social media, which were seen by some of Devins' 6,000 Instagram followers.

Following the crime, he then called police and made "incriminating statements," which also indicated that he had plans to harm himself. When police arrived, they found that he had slit his own throat.

In court on Monday, Clark said that he needs to "apologize to all the people that knew and loved her." He will be sentenced in April.

Police Car
In this photo, police cars sit on Main Street in Dallas, Texas, on July 7, 2016. Laura Buckman/AFP/Getty Images