HOUSTON (KTRK) -- Police are still searching for the gunman who ambushed a Houston mother-of-four upon her return home.Investigators now identify the victim as 40-year-old Ha Tran. They say she was attacked just after parking her van on the street near her apartment around 9:30pm Wednesday in the 8100 block of Maplecrest. According to police, the man demanded Tran's money and a cellphone, then shot her."I hope they find the person that's done this and the family gets justice, and that her soul rest in peace," said Alexis Bradford, who describes herseff as a friend of Tran's.Bradford says Tran leaves behind a husband and four children between the ages of 3 and 11.At first, police said the same suspect might have been responsible for a similar robbery at the same apartment complex 30 minutes prior to the murder. A spokesperson on Thursday afternoon, however, could find no mention of that from detectives.The gunman is described only vaguely as a man wearing a red cap and black shirt. If you have any information about this case you can contact Houston Police or Crime Stoppers at 713-322-TIPS.