"He was just 21, that's like baby, still baby you know, he was just a young man just starting to live life. I couldn't believe it, that they took my son, I just couldn't believe it I was in shock for weeks, months," said Terry Horman, the victim's mother.
Those weeks and months have now turned into years, a decade without Joshua and without justice.
Family and friends said a prayer at a vigil they held Tuesday night at Joshua's grave, as they hope that one day they'll receive justice. They are encouraging community members to come forward with any information that might lead to that justice.
"You can be anonymous. Don't be afraid just come forth, tell what you know, get it off your shoulder. Your shoulders have got to be heavy," says Horman.
Police said the man died from suffocation. His mother says her son knew his killers and that he always locked his apartment and used his peep hole. She says he wouldn't have let someone in unless he trusted them.
Although 10 years have passed, Horman isn't giving up hope. She continues to stay strong with her faith that someone will come forward with information that will lead police to the person who robbed her son's life.
"I stay strong by keep going; keep that smile on that face even though there's a lot of pain behind this smile that I carry everyday," Horman said.
Anyone with any information is urged to contact the Frederick County Sheriff's Office at 301-600-4131. Tips can be kept anonymous.