INKSTER, Mich. – Grief has consumed John Guarascio.

His daughter Jenna was just 21 when she was killed in Inkster in November of last year. Jenna was sitting in her car with her boyfriend in the front seat and his cousin in the back. A gunman appeared and started shooting into the car.

Read back: 21-year-old woman shot, killed outside home in Inkster

"You take on responsibility for your children. My responsibility is to make sure that she gets justice," said Guarascio. "That's why I don't want this story to just disappear. She's not just another statistic, she's my daughter."

In the year since her death, Guarascio has spent a lot of time waiting for that phone call from police with news someone is in custody.

"We were given all these lofty hopes, and in the end it's just another dead person in Inkster," he said.

The father is hoping someone has the courage to put a killer -- or killers -- behind bars. He says the men in Jenna's car haven't been forthcoming and he believes someone heard the barrage of gunfire that night and may have seen something.

"If people don't talk, people are just going to continue to kill people and get away with it," he said.

Jenna's birthday is Wednesday -- the first birthday since her murder. The family plans to hold a small memorial.

Almost a year later, has this case gone cold, or are there leads police are looking into?

Inkster police say this is an ongoing investigation and they are pursuing some leads. Michigan State Police investigators have a general idea what led up to the shooting, but their biggest problem is that people aren't talking.