A victim's father looks back on the Aurora theater shooting - Hawaii News Now - KGMB and KHNL

A victim's father looks back on the Aurora theater shooting

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Alex Sullivan was at the midnight showing of "The Dark Night Rises" when a gunman opened fire in the theater, killing Sullivan and 11 other people. (Source: KCNC/CBS) Alex Sullivan was at the midnight showing of "The Dark Night Rises" when a gunman opened fire in the theater, killing Sullivan and 11 other people. (Source: KCNC/CBS)
Alex's father, Tom, has become a gun safety advocate, calling it a "personal form of therapy." (Source: KCNC/CBS) Alex's father, Tom, has become a gun safety advocate, calling it a "personal form of therapy." (Source: KCNC/CBS)
The shooting took place on July 20, 2012, killing 12 people and injuring 70. (Source: KCNC/CBS) The shooting took place on July 20, 2012, killing 12 people and injuring 70. (Source: KCNC/CBS)

AURORA, CO (KCNC/CBS) – "It's a day where you kind of tip toe through," Sullivan said.

Although the calendar says it's been two years since tragedy struck Tom Sullivan's family, he says it feels just like yesterday that he lost his only son.

"He was just a movie buff, a comic buff, a very hard worker," Sullivan said.

Alex Sullivan was sitting in the 12th row in the 12th seat during the midnight showing of The Dark Night Rises when a gunman opened fire. It was his 27th birthday

"This ribbon here has the batman on the top."

Sullivan got a tattoo in memory of Alex last year, a ribbon in his honor with a green heart for their Irish heritage.

"And seven-twenty for the day he was born and the day he died."

After a visit to his son's grave this weekend and a private mass, Sullivan says he'll spend Sunday celebrating his son's birthday with his family.

"This needs to change," Sullivan said. "This can't keep going on."

Something he hasn't stopped doing since Alex's death is trying to stop it from happening to another family.

He's campaigned for gun safety in Washington, and joined forces with organizations like Every Town for Gun Safety, looking to end gun violence and make communities safer.

"By delaying conversation about this, by delaying any kind of progress on this, this stuff happens over and over again."

He calls it his personal form of therapy, one he will continue doing until he knows it won't happen again.

"There can't be fathers who continue to have to bury their sons the way I did," Sullivan said. "That needs to stop."

Copyright 2014 KCNC via CBS. All rights reserved.