Valadez was killed responding to a call in June 2009.
His family says Sunday's street dedication at 26th and Homan was another bittersweet reminder of a good man lost to violence.
"This is such an honor, not only to my brother but to the family, for my brother's son who never met his dad," said Valadez's sister Brenda. "He'll know there's a street where he actually grew up - he lived here for 18 years."
Officer Valadez's ten-month-old son was in the crowd for Sunday's ceremony.
"We wish we didn't have to go through this, but it is so amazing... the love and support, and just everybody keeping his memory alive," said Brenda Valadez.
Police Superintendent Jody Weis was also at Sunday's dedication.
"It's a sad day, and it's also a day that means a lot to police officers, but it's also a day, I think to celebrate the profession," said Weis.