Jason Christian Vukovich, 41, is accused of breaking into the homes of three convicted child sex offenders and beating them

An Alaskan 'avenging angel' is accused of breaking into the homes of convicted sex offenders and attacking them in retribution for their crimes.

Jason Christian Vukovich, 41, used the state's sex offender registry to find the addresses of three convicted sex offenders before brutalizing them, police say.

In one case the victim, 67-year-old Wesley Hayes Demarest, was beaten so badly with a hammer that his skull fractured.

Vukovich is accused of attacking Demarest along with two other men between June 25 and June 29.

The other two victims were named by KTVA as Charles Leamon Albee, 68, and 25-year-old Andres E Barbosa.

Cops say that over the course of five days Vukovich broke into the victims' homes, beat them with his fists or a hammer, and then stole possessions before fleeing.

He was arrested on June 29 shortly after Demarest was attacked, and officers say he had a notebook in his possession with more names inside.

In total Vukovich faces 18 charges including assault, robbery, burglary and theft, and pleaded not guilty during a court appearance last week.

Wesley Hayes Demarest, 67, was knocked unconscious with a hammer during an attack on June 29 before his laptop and other items were stolen

Demarest, who was jailed for attempted child sex abuse, said Vukovich called himself an 'avenging angel' before hitting him over the head with a hammer

Vukovich has previously been convicted of fraud, theft, possession of a controlled substance and assault, and was most recently released from jail on June 24 last year, the same day he attacked Albee.

At 9.30am Vukovich knocked on Albee's door before pushing him inside his home and ordering him to sit on the bed, according to a bail memorandum seen by the Alaska Dispatch News.

Vukovich then slapped Albee repeatedly in the face, the memorandum says, before saying he had found Albee's name on the sex offender register.

Demarest recalled that Vukovich was carrying a notebook with the names of other sex attackers inside

After taking several items from inside the property, Vukovich left, it is alleged. Albee said Vukovich was carrying a notepad with other names in it.

Two days later Vukovich arrived at the home of Barbosa at around 4am alongside two women, again knocking at the door, court papers say.

After confirming that the man's name was Barbosa, Vukovich allegedly threatened him with a hammer before forcing his way inside the house.

Vukovich allegedly sat Barbosa down in a chair, 'punched him in the face' several times, threatened to 'bash his dome in' with a hammer, and said he was there to 'collect what Barbosa owed'.

While one woman filmed the attack on her cellphone, Vukovich and the other woman are accused of stealing several items from Barbosa's apartment including his truck, and then leaving.

During the final attack, on June 29, Demarest said he heard someone break into the home he shares with another man at around 1am.

Vukovich is accused of making his way inside the property and ordering Demarest to get down on his knees or lie down on his bed.

When Demarest refused, Vukovich allegedly hit him over the head with a hammer, knocking him unconscious and fracturing his skull.

Vukovich is also accused of attacking Andres E Barbosa, 25 (left), and Charles Leamon Albee, 68 (right), before stealing items from their homes and fleeing

In a letter from jail Vukovich, who has pleaded not guilty to the charges, claimed to have been sexually and physically abused by his own adoptive father

Demarest said: 'He told me to lay down on my bed and I said "no." He said "get on your knees," and I said "no".

'He said "I’m an avenging angel, I’m going to met out justice for the people you hurt."'

Vukovich is then accused of stealing several items, including a laptop, and fleeing.

When he regained consciousness, Demarest called police who found Vukovich sitting in a Honda Civic nearby along with a hammer, stolen possessions, and a notebook with the names of Demarest, Barbosa, and Albee inside.

In a note from prison, seen by the Alaska Post Dispatch, Vukovich claimed to have been physically and sexually abused by his adoptive father, including being beaten with pieces of wood and whipped with a belt.

He wrote: 'After being physically and mentally abused by a predator, my life was forever changed.

'I literally gave my own existence no value or concern. I became a thief and a liar and went on to make many poor choices throughout my life.'

Vukovich also wrote that children 'should be able to play in the streets and parks and go to church without the threat of pedophiles lingering around them.'