Someone stabbed an 18-year-old man to death in a parking lot in Waldorf, Maryland, Thursday morning after an argument.
Police haven't named the suspect or the victim.
The incident started when the 18-year-old and two friends went to the apartment of a man who they knew -- and were in an argument with. They knocked on the door and got into an fight.
The fight continued into the parking lot, where the man in the apartment stabbed the 18-year-old.
The investigation is continuing.