RUSKIN — Deputies arrested a woman Monday night in connection with two killings last week, according to the Hillsborough County Sheriff's Office.Samona Louise Ramey, 32, of Wimauma faces two charges of first-degree felony murder with a firearm. Ramey was held at the Hillsborough County jail without bail.Detectives are still investigating the murders. The Sheriff's Office released an image from a surveillance camera of an unknown man they hope to question.Alexis Martinez, 24, and Juanita D. Solorzano, 33, were fatally shot Thursday, detectives said. The two were found around 11 a.m. in a mobile home on SE 14th Avenue near the National Weather Service's Ruskin station.Anyone with information about the incident is asked to call the Sheriff's Office at (813) 247-8200 or submit a tip through Crime Stoppers by calling 1-800-873-8477.Report anonymously at crimestopperstb.com or with the P3 Tips mobile application.Contact Jonathan Capriel at 813-225-3141 or jcapriel@tampabay.com. Follow @jonathancapriel.