20-year-old Camren Horne, 20-year-old Dominique Lee, and 23-year-old Marquis Rayner, all of Coatesville, are charged in the murder of Dominique Williams.
Prosecutors say it was June 29, 2012 when three masked men burst into a home in the 700 block of Merchant Street.
One of the men shot Williams who was sitting in a chair playing a video game. He later died of the gunshot wound.
Prosecutors say one man stood guard at the door while the other two roughed up another person in the home and stole a jar of marijuana.
The three then fled.
Police were able to link Horne, Lee and Rayner to the crime using DNA and fingerprint evidence, as well as witness testimony.
All three have been charged with homicide, robbery, conspiracy and related offenses.