New Footage in Aiden Fucci Murder Case Shows Mom Cleaning Tristyn Bailey's Alleged Blood

New evidence released in the first-degree murder case against 14-year-old Aiden Fucci showed the teen's mom allegedly cleaning the blood of 13-year-old Tristyn Bailey off her son's jeans.

Fucci is accused of fatally stabbing Bailey in St. Johns County, Florida on Mother's Day earlier this year. The Medical Examiner's findings concluded Bailey was stabbed 114 times.

New surveillance video released on Tuesday showed Fucci's mom, Crystal Smith, in the upstairs bathroom of their family home scrubbing a pair of jeans. Prosecutors said it is the same pair of pants that tested positive for blood earlier this year.

Smith was arrested in June with evidence tampering, a third-degree felony. She has pleaded not guilty.

Among the new evidence released this week was surveillance video, which police said captured the last time Bailey was seen alive.

One video shows Fucci and Bailey allegedly walking in their Durbin Crossing neighborhood the night the girl was stabbed to death. Another shows someone, who investigators said is Fucci, running away from the same wooded area, alone, a few hours later.

Prosecutors also released Snapchat videos of Fucci and a friend in the back of a squad car after Bailey went missing.

"They've got us in a f**king cop car...tripping dude," Fucci tells the camera.

"We're having fun, in a f**king cop car," Fucci is heard saying in another. "Tristyn if you f**king walk out the damn..."

At the time of Bailey's disappearance, Fucci posted a selfie from the backseat of a police car with a message reading "Hey guys has anybody seen Tristyn lately."

While the two teens attended Patriot Oaks Academy together, it is unclear if the two were friends. Fucci told investigators he and Bailey got into a fight earlier that day, which led him to push her forcefully to the ground and hit her head.

In May, State Attorney R.J. Larizza told reporters the location of the stab wounds indicated they were "defensive in nature."

"The bottom line is that premeditation could be inferred certainly from just the sheer number of stab wounds that Tristyn Bailey had to suffer," Larizza said at a press conference.

The state attorney also said that multiple witnesses told investigators Fucci had said he was planning to kill someone by "taking them into the woods and stabbing them."

"He had told friends that he was going to kill someone and that it was imminent—within the next 30 days or within the month," Larizza said. "And he talked about that to some of his friends several times."

Fucci is currently in custody at the Duval County jail where he awaiting trial. Both Fucci and Smith are scheduled to have pretrial hearings next Wednesday.