Pasco County sheriff's deputies discovered a child with autism missing and four bodies nearby while conducting a welfare check Thursday.

An Amber Alert has been issued for 4-year-old Ismael "Tristan" Santisteban, who may be with 28-year-old Adam Matos.

Deputies have gotten conflicting information regarding whether Matos is the child's biological father. People who knew Matos said he called the boy his son.

Deputies said the 1991 blue F-150 pickup truck Matos was believed to be traveling in has been found. It was towed a couple of days ago from the area.

Officials strongly believe that Matos is still in the area and has been seen out on various occasions without the little boy.

The child was last seen at his home located at 7719 Hatteras Drive in Hudson on August 28.

Deputies also discovered the bodies of two men and two women piled on top of each other about three quarters of a mile down the road.

“While circulating an area, one of our sergeants smelled something horrible. He saw birds circulating," Sheriff Chris Nocco said. "At that time, he noticed over a hill there were several bodies.”

The victims have not been identified yet. Nocco said they recently moved here from Pennsylvania.

“Our main concern is to get Tristan back and make sure he is safe because I can tell you right now we have grave concerns about him being with Adam," Nocco said.

Nocco said law enforcement officials are currently looking for the boy at local establishments. Tomorrow will be more of a grid search involving K-9s, officials said.

Matos is said to be possibly armed and dangerous.

If you have any information please contact the Pasco County Sheriff's Office at 727-847-5878 or 911.

Deputies recently called to the house for domestic situation

Sheriff Chris Nocco said Adam Matos was involved in a domestic incident at the home last week, but Matos was not there when deputies arrived. According to reports, the boy's mother had made a call to 911 stating that Matos had put a knife to her neck.

Neighbor Andrew Coulstring said he heard a woman screaming from a home in the area in the last couple of weeks. He said the sound was bad enough, he and his mother went to check it out.

"It sounded like a woman in pain, like she had gotten hurt, and really, we were concerned enough to start heading in that direction," said Coulstring. "That's how the scream was, it was like someone needed help."

Coulstring said he wishes he would have called 911 at the time. He also said he saw buzzards circling in the wooded area just to the north of his home yesterday.

"I've seen him driving up and down this street," said Coulstring. "Either heading out to work or going to and from the house. Yeah, I've seen him a few times. I mean, made eye contact with him because I look at everyone that drives by here."

Matos briefly employed by local Hudson restaurant

Adam Matos briefly worked as a dishwasher at 'Get Hooked,' a popular seafood restaurant down the street from the home.

"He seems like a nice young man, came to apply for a job, said he had some cook experience out of New Jersey, worked for about seven to 10 days. One day he never showed up or came back," said the owner, John Hill.

People who worked with Matos at the restaurant said they're "shocked" and "confused" by the investigation that's underway involving him.

Hill said Matos came to the restaurant about two weeks ago. He told managers he was relatively new to the area and needed a job.

People who worked in the kitchen with him said he was nice and mild-mannered.

"He seemed really quiet, seemed pretty calm and collected," said Tyler Ridgeway who works as a cook at the restaurant.

Another cook, Jacob Rodriguez, said Matos kept to himself.

"He was just really, really quiet," said Rodriguez. "I'm so surprised about this because he was just such a quiet person. He came to work, did whatever he had to do, end of the night he just left, went home and came back the next day."

They said after a week, Matos' behavior changed.

Managers said last week he stopped coming to work.

"Looked like a great kid, from New Jersey or Pennsylvania or wherever he's from," said Hill. "He came in very nice, respectful, did his job, didn't say much then one day he said he had to watch his son and then we never saw him."

Hill said when Matos was a "no show" for work, he was fired.

Managers said he did come to the restaurant to pick up his last paycheck on August 29, but they haven't seen or heard from him since.