A motorcycle ride Saturday in Indianapolis will help raise money for a park being built in Delphi in memory of Abby Williams and Libby German.

DELPHI, Ind. (WTHR) - On the site of where a park will one day stand in memory of his granddaughter Libby German and her friend Abby Williams, Mike Patty utters the same phrase he's said for more than two years now.

"Today's the day."

That's what the families of both girls have made their daily mantra, hoping one day, their killer will be caught.

"One of these days we're going to be right. Today will be the day," said Patty, explaining he's optimistic, but not pinning his hopes on recent developments like investigators requesting the DNA and autopsy results of 55-year-old Paul Etter.

Etter died by suicide last month after a standoff with police in Boone County. He was wanted for rape and kidnapping of a Tippecanoe county woman. Investigators say Etter's name had already come in as someone to look at in the Delphi case.

"Eventually, we're going to get to the bottom of it, whether it's this tip or not," said Patty.

Patty hopes a new police sketch of the suspect, released in April, will get them closer.

It's the second sketch investigators have shown the public. Early in the investigation, police released a sketch of a man they thought was the suspect, but have since said it's not the man for whom they're looking.

"Whatever information they collected, enabled law enforcement to make this determination," said Patty of the second sketch.

At a news conference in April, police also released video of the killer walking. The video was captured on Libby's cell phone the day the girls disappeared, along with more audio of him speaking.

"Somebody out there knows something," said Patty.

Police have also said the killer could possibly be from Delphi or someone who visits there often, and is just hiding in plain sight.

Patty stays alert.

"He's been here once and we seen what he did. Could he be right here, now? Could he still here? Could he have never left?" asked Patty. "All those thoughts go through my mind all the time."

Two-and-a-half years later, Mike Patty never thought he'd be still waiting for answers.

"I really figured we'd be closer. You know what I mean? And would have had some sort of resolution by now," said Patty.

He knows it's coming, though. Patty's a patient man who hasn't lost hope.

"We're going to get this guy. There's too many people out there, helping us to get this done," Patty said.

In the meantime, Patty is focusing on the 21-acre park planned in memory of the girls. The Abby and Libby Memorial Park is set to be open sometime in 2020 with at least one softball field and an amphitheater.

Eventually, three ball fields will be in the park, along with the amphitheater, a walking trail, a concession stand, bathrooms and a park hall.

$50,000 has already been raised for it through crowdfunding, with the state providing matching funds from the CreatINg Places program.

You can contribute here.

A memorial ride is also planned in Indianapolis Saturday to raise money to help build the park. A breakfast will be held Saturday at 9 a.m., with registration for the ride starting at 10 a.m. and kickstands going up to start the ride at noon.

The ride will start at the Kitley Inn on the southeast side of Indianapolis, with stops at Heavy's Bar and Grill in Camby, Frenchy's Pub in Morgantown and Whit's Inn in Whiteland before returning to the Kitley Inn.

The cost to join the ride is $25 per person or $35 per couple, which will include food after the ride.