A death investigation is underway in Madison County after Neal Matthias Grillo, 37, became unconscious when deputies tried to arrest him.

A member of the Madison County Sheriff's Office said they interviewed Grillo at their office on Wheeler Avenue Monday morning. He was accused of rape 1st degree, sodomy 1st degree and burglary 2nd degree. These alleged incidents occured a week before the interview.

After the interview, Grillo was told by investigators he was going to be arrested on the above charges. During the 15 minute wait for him to be transported to jail for booking, he went unconscious.

A deputy performed CPR until HEMSI arrived and then they started performing life saving measures. Grillo was pronounced dead at Huntsville Hospital.

The Madison County Sheriff's Office conducted a search of Grillo's house at Bridge Crest Drive in Harvest on Monday night. A HAZMAT team helped with the search because of the unique nature of the case. They were looking for chemicals in the home but did not find anything.

Some neighbors of Grillo say it is worrying to have lived down the street from him. Sonya Morris who has lived on the same street as Grillo since 2011 said that even though she knows someone is innocent until proven guilty, she would have liked to be more informed by law enforcement about the allegations against her neighbor.

"The most concerning for me is that we're not told anything, so it makes me wonder if this was going on, if this had been reported, because he had to go down for an interview," Morris said.

Morris said anything is possible in the world we live in and that the scene on her street is another reminder for her to play it safe and to be prepared.

"It makes me stand on the alert to be sure that I'm not out during those times of the evening and if I am, that I have some type of protection with me," Morris said.

An autopsy and toxicology report are being performed to determine the cause of Grillo's death. The Madison County Sheriff's Office said they believe he may have ingested something that caused him to become unconscious.

A deputy sheriff that was nearby when CPR was performed on Grillo went to the hospital and was tested and observed overnight. He's been released and will return to duty Thursday. The sheriff's office said nothing links the two incidents at this time.

The investigation is ongoing and WAAY 31 will continue to update.