Mott was reported missing with grandmother, but police said they believed they had found her body in a shallow grave in the backyard of her son's home.
Logan Mott is believed to be in south central Pennsylvania and a warrant is being issued for his arrest on a charge of auto theft. Sources tell Action News Jax that Logan, the guns and the Dodge Dart are still missing. Detectives with the Neptune Beach Police Department, the Jacksonville Sheriff's Office, the FDLE and the FBI are investigating the case.
A surveillance camera at a gas station in south-central Pennsylvania picked up an image of Logan and the vehicle on Thanksgiving at 1:15 p.m. Ron Lendvay, a director of investigations and homeland security for the Jacksonville Sheriffs Office, told Florida Times Union.
According to the Jacksonville Sheriff's Office, authorities named Logan Mott, a 15-year-old boy, as a person of interest in the case.
Stay with First Coast News as this story develops.
The Jacksonville Sheriff's Office said it will give a briefing on the search for a teen and his grandma who were last seen in Neptune Beach.
He said Mott was turned over to Buffalo police, who were coordinating with police in Jacksonville on the teen's return.
On Tuesday, a Florida Missing Child Alert was issued for Mott, a white male, 5 feet 9 inches tall, 120 pounds, with blonde hair and brown eyes, reported Fox 13 News.
She said a Jacksonville detective will fly to meet Logan on Saturday. She said the last time she spoke to him was on Sunday night. "His father and I just want answers".
Pictured, Logan Mott, Neptune Beach, Florida teen and his grandmother, Kristina French.
"If you have taken them we are begging you to return Logan and Kristina", she begged in her post.
"He turned around on the bridge and came back", Bowker said, adding that it's not uncommon for people to do that, often because they've made a wrong turn. "It has just been a tough time for him transitioning from one school now to high school, and he is in the early college program and that's really intense", Campbell-Mott said.