Dolton Police are expected to reveal the arrest the people they believe are responsible for the death of Casara on Wednesday.
At a prayer vigil that was held Sunday night, which was attended by the Dolton mayor and chief of police, both insinuated that arrests were close at hand.
"If anybody knows anything, just help," said Estrellita Casara, Eva's mother. "I want to rest. I want peace. Want answers."
In the village of Dolton Saturday night, prayers and a mother's emotional appeal for closure.
It's been three days since the Christmas night shooting which left pregnant teen Eva Casara dead, living only long enough for doctors to deliver her premature baby and though police say they're close to make an arrest, no charges have yet been announced.
"We recovered some crucial evidence," said Dolton Police Chief John Franklin. "We still have a couple of people to talk to, some witnesses to speak to, some statements to nail down. We're confident there is going to be an arrest very soon regarding this horrible crime."
Standing side-by-side with Casara's mother, Dolton police and the mayor himself promised to bring this investigation to a close.
"It's not only tragic, it's an embarrassment to our community," said Mayor Riley Rogers.
Saturday night's prayer vigil attracted dozens of supporters.
Friends, neighbors and village officials came out in support of the teenager's family and of baby Lailani. Born at just 1-pound, 5-ounces, the infant is still struggling for life.
"She's hanging in there. She's a fighter. She's going to continue to fight," said Jennifer Ross.
A press conference is expected to be held late Sunday night, in which charges are going to be announced.