Police are asking the public’s help in finding a 14-year-old Roslindale girl who has been missing since October. Police recently received an updated photo of Jenny Nkwah, who has not returned to her home on June Street since Oct. 30, said Officer Neva Coakley, a police spokeswoman. Nkwah has been seen by friends since she went missing, most recently in Hyde Park, said Coakley. She has only had sporadic contact with her family, police said. Nkwah is described as black, 5-feet-3, 140 pounds, with a medium build and black hair and brown eyes. Anyone with information on Nkwah’s location is urged to contact detectives at 617-343-4595.