Police are searching for a person of interest in the murder of an 18-year-old girl in her mobile home. Investigators say Robert Spencer is still at large and could be armed and dangerous, and they need your help finding him. Neighbors living near the mobile home where the body of Desiree Barritt was discovered say they never dreamed the violence would escalate to that level. One neighbor who asked not to be identified says in the past he's heard gunshots coming from the home where the two lived. He also says that he and other neighbors in the area knew Robert Spencer owned a gun and would see him shooting outside in his yard. Neighbors described Desiree as a sweet girl who simply became mixed up in something she couldn't handle. Desiree's family says Robert Spencer has more facial hair, and a few visible tattoos on his arms. Police say this is an active ongoing search for Spencer. If you have any information about this or any other crime, call our partner, First Coast Crime Stoppers, at 1-866-845-TIPS. You will remain anonymous and could be eligible for a cash reward up to $1,000.