"Very outgoing, always smiling, laughing, telling jokes, barely saw him frown," she said.
A year ago Tuesday, the 19-year-old was shot and killed on Steere Avenue in Providence. Marchand's family gathered at his grave to talk about Tyler.
"It's really hard for me to accept he's gone, and still a year later I don't believe it," Lopez said.
What has made this past year even more painful for Lopez is not being able to see anyone held for her cousin's death. After an initial arrest was made on a charge related to the case, no one has been charged with Marchand's murder.
"To know this kid is out there on the street living his life and my cousin's under the ground?" Lopez said.
Maj. David Lapatin of the Providence Police Department told NBC 10 they are still actively investigating the murder and continue to follow leads.
Lopez said there's someone who has information about her cousin's murder.
"There's no way. He wasn't alone. People were around. It's my understanding there was an altercation with other people. Where are they at?" she said.
Lopez said an arrest won't bring him back, but will at least bring many in her family some peace of mind.
Lopez said her family will never give up hope that they will finally see justice for the person who took the life of her cousin.
"No one will ever, ever forget," she said.