The Ohio ‘serial killer’ discovered when a kidnapped woman dialed 911 has led police to a fourth body his mother has told DailyMail.com.

In an exclusive interview Theresa McFarland disclosed that law enforcement visited her at her Ashland home yesterday to inform her that her son, Shawn Grate, 40, had admitted to killing a woman in nearby Marion.

The revelation brings Grate’s body count to four women across three Ohio counties - Ashland, Richland and Marion – and according to Mrs McFarlane there may be more.

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Shawn Grate's mom Theresa McFarland is pictured above at her home in Ashland, Ohio, where she spoke exclusively with DailyMail.com

Shawn Grate, 40, had admitted to killing a fourth woman in nearby Marion. His mother said he led police to a fourth body

She said: ‘They came over and talked to us yesterday to tell us there was another one in Marion. He said he did it because I was upset with her. They thought maybe I would remember her but I couldn’t place her.

‘I don’t think it’s anybody he knew. It’s just like those girls in Ashland I know he didn’t know them but he may know that one girl who he had captive.

‘None of it makes sense and there may be more. When people go on rages like that…you look at people like Ted Bundy and Jeffery Dahmer and you look at all the malfunctions of the brain and it doesn’t make sense but it happens. The Devil reigns.’

Dahmer, known as the Milwaukee Cannibal, killed 17 men and boys between 1978 and 1991.

Bundy confessed to killing 30 people in seven states between 1974 and 1978 and was regarded as handsome and charismatic by many of his female victims.

Grate's mom compared her son to Ted Bundy, pictured left, and Jeffery Dahmer, seen right

Shawn Grate (pictured), 40, now faces two counts of murder in the deaths of Griffith and 43-year-old Stacey Stanley. He's being held on $1 million bond

Speaking of her son she said: ‘Yes he’s good looking but the Devil’s good looking too. He ain’t no red horns and all that stuff. You find out he’s charming and of course that charm can charm the pants off anybody, not to be nasty, but you just know how it works.’

Mrs McFarland, 63, described herself as ‘heartbroken’ but said she couldn’t doubt her son’s guilt when he had led officers to the bodies himself.

Grate is scheduled to appear in court in Ashland on Monday for a competency hearing after being charged Friday with kidnap and murder.

Officers who rescued the alleged kidnap victim from an Ashland house found the bodies of two women in it and an adjoining property. Two of the bodies have been identified as Elizabeth Griffith, 29, and Stacey Stanley, 43.

Victims: Stacey Stanley (right) and Elizabeth Griffin (left) have both been named as two of Grate's victims

He has yet to be charged in connection with the body found in nearby Mansfield, some 40 minutes drive away in Richland County and police have yet to make any announcement regarding the Marion discovery.

Mrs McFarland said she had not spoken to her son or had any contact with him for more than three years.

She said: ‘He’s been estranged from the family for more than three years. I wanted to go to the arraignment on Friday but I don’t know if I’m strong enough yet to handle it.’

Led away: Shawn Grate in Ashland Police custody after he led officers to the bodies of three women in Ashland and in Mansfield. He has confessed to one murder already, prosecutors say

Clearly emotional she continued: ‘I didn’t know it went back so far. I guess I can say I’m just glad that he’s got a conscience and now he’s stopped. It’s too bad it’s too late for the victims. It’s just so very sad and I’m praying for them and their families. I’m praying for him too.

‘It’s shocking because I love him and I know he loves me too but his love is a twisted love.’

She admitted that Grate had always been ‘headstrong’ and had a need for control.

She said: ‘You couldn’t live with him. You try to help him and the next thing he’s running your life. He’s not working and you think, “Why don’t you want to go to work? You’ve got to go to work to make a living. That’s our society.’

According to Mrs McFarland she and the rest of Grate’s family are ‘reeling’ from the recent deluge of revelations and fearful of what may come next.

She said that none can begin to make sense of what has happened saying ‘Shawn is the only one who has all the answers,’ but she said that drugs were to blame for some of her son’s descent.

She said: ‘I don’t know what drugs he was doing but after he came out of prison he was changed. They took his mind.

Police execute a search warrant on a home in Ashland, Ohio, where they found the kidnapped woman and two bodies

‘We all love him and tried to help him but you can only do so much. It has to come both ways. And I know he knows, he was taught, right from wrong. It isn’t as if he didn’t know he just chose to do what he wanted to do in the moment.’

Right now she said: ‘It feels like a nightmare. I pray for the families. It’s like a death to me too and I have to grieve.’