Police are now asking for help in solving three cold case homicides involving teenagers that happened a year ago. Ktvus allie rasmus was there as a mother of two of the boys made an emotional plea for help. Good afternoon, allie. Reporter two of the killings happened at this intersection, 100th and longfellow in oakland, almost a year ago. The two were sitting in a parked car. They were both 19 years old. Someone came up to them or some people came up to them, opened fire, shooting and killing them. Two weeks prior to that, lee whethersbee was shot and killed as he was walking home from the boys and girls club a few weeks ago. The homicide detective says they have a good idea who may be behind the killings. As he put it, knowing and proving are two different things. Today, investigators and families of the victims spoke here. They hope to generate momentum and knew leads. The mother made an emotional plea for anything with information to come forward. Please, im begging you. This is le