Breaking news alert. Alison in prince georges county, crews are on the scene of a house fire in riverdale. A short time ago firefighters were evacuated from the building because of dangerous conditions. The Pg County Fire Department says this is the seventh fire they have fought today. No reports of injuries at this time, but stay with abc seven for updates. It went from a, a 14yearold boy murdered, a second teenager rushed to the hospital. Jonathan tonight we are learning more about the victims and what led up to the stabbing. Tom roussey has the latest. Tom . this teenager who was killed was only a high school freshman. The police believed it was his mothers boyfriend who did it. The police spent much of the day going in and out of the building, focused on what happened on the second floor and that apartment. It was something decade easily be heard by the folks living in the apartment above. It woke me up. It was really, really loud. M a little after 7 00 in the morning, alexis black