MURFREESBORO, Tenn. -- A second liquor bottle has entered a Murfreesboro investigation into a crash that killed a 12-year-old.

Video: Tequila Bottle Linked To Officer

The incident began on July 17 when Rutherford County Sheriff's Department Detective Sgt. Ron Killings ran over 11-year-old Lakeisha White as she was riding her bike around 9 p.m. on a residential street southeast of Middle Tennessee State University.

Channel 4 I-Team reporter Jeremy Finley reported on Wednesday that a bottle and a receipt linked Killings to a bottle of liquor found near the crash site. A first liquor bottle was recovered by White’s friends and family after the crash.

Attorneys representing White's family informed Finley of the evidence linking the bottle of tequila to Killings.

"I think they are trying to cover up what happened," White's grandmother, Rose Collier, said.

At the time of the crash, witnesses told police they saw Killings throw a bottle of booze into a nearby ditch.

"It was like a half-gallon alcohol bottle," one witness said on the night of the crash.

A sheriff's department spokesman downplayed the bottle's relevance, and no bottle was recovered in the police department’s investigation until July 28.

"I would urge everyone to wait and see what the Murfreesboro FACT team investigation reveals," Rutherford County Sheriff's Department representative Dan Goodwin said just after the crash.

While Murfreesboro Police Department investigators chose not confiscate the half-gallon bottle of liquor, family friends did.

After a witness said he saw Killings throw another identical bottle into a trash can nearby, the family gathered that, too.

Attorneys for the family told Finley that one of the bottles was in a bag, with a receipt.

Killings' name, attorneys said, is on the receipt, and it also shows that the bottle had been purchased two days earlier.

"We're not saying the officers covered it up, we're saying the system is covering it up," Collier said.

Both bottles in the investigation were Jose Cuervo, attorneys said. Officials did not disclose if the bottles were full, empty or any other details.

The Murfreesboro Police Department on Tuesday acknowledged that the first bottle discovered belonged to Killings and that they made a mistake in not collecting it for evidence.

The department also pointed out that Killings' blood tested negative for alcohol.

But the attorneys for White's family said they want to know when the blood test was given.

"Our lawyer's checking out everything," Collier said.

The bottles are with Murfreesboro police and representatives are not discussing any aspect of the department’s investigation. A representative reiterated that the bottles were not relevant to what caused the crash.

Murfreesboro police said all their findings and all of their evidence will be turned over to the district attorney for review.

Finley reported that Killings may have violated a sheriff department’s policy that forbids alcohol for personal consumption in a county vehicle. A spokesman for the sheriff’s department told Finley that officials are waiting for the completion of the investigation to see if Killings violated the policy.

If he is found in violation of having alcohol in his county cruiser, he would lose the car for seven days because it would be his first offense, according to county regulations.

After being placed on administrative leave, Killings was back at work on Wednesday.