Asgierr Ulfr, 26, was indicted on a first-degree murder charge for the death of Christina 'Danielle' Scarr

A Florida man charged with a woman's grisly murder said her death was an accident and he initially broke into her home to 'scare' her - and then come to her rescue, according to court documents.

Asgierr Ulfr, 26, was indicted on a first-degree murder charge after the body of 20-year-old Christina 'Danielle' Scarr was found duct tape to her bed in April at her home near Apopka.

Ulfr, who changed his name from Michael Lobianco Jr, initially told police that he had walked into Scarr's house on April 6 to find an armed intruder inside but the man escaped through a back door.

Ulfr's sister, however, told authorities a completely different story saying she heard him confess to the crime in a phone call with an attorney.

According to court documents obtained by the Orlando Sentinel, Ulfr's sister Danielle Brown told Seminole County Sheriff detectives that her brother told an attorney that he did not mean to kill Scarr, whom he had lived with at one point.

'He said it was an accident, that he didn't mean to kill her and he just wanted to scare her and hurt her because she hurt him so bad,' Brown told detectives.

According to documents, Ulfr confessed to killing Scarr telling an attorney that it was accident and he was trying to scare her - and then rescue her

'(He also said) that he wanted to be her savior, he wanted to be the one that came in after a quote-unquote intruder did and save her'.

According to Brown's statement, Ulfr hatched a plan on how he was going to scare Scarr and then rescue her but things did not happen the way he wanted them to.

Investigation records state that two days before the murder Ulfr went to a local Walmart and bought a ski mask, boots, duct tape and zip ties. Then, on the night of April 5 he entered Scarr's home while she was out with her boyfriend and hid in a closet until they came back.

As the couple was sleeping, Ulfr walked around the home helping himself to a glass of water in the kitchen.

After the boyfriend left for work in the morning, Ulfr attacked Scarr from behind tying her legs and arms together with duct tape and zip ties. He then choked her until she passed out.

Brown told detectives that Ulfr allegedly confessed to also cutting off some of Scarr's hair because it was getting in the way as he tried to duct tape her mouth shut.

During the attack, Scarr woke up and Ulfr choked her again until he thought she was unconscious.

Ulfr is accused of entering Scarr's Florida home on the night of April 5 and hiding in a closet until the next morning and then attacking her

Ulfr allegedly told an attorney that he chocked Scarr unconscious and when he realized she was dead he shot himself in the foot and called 911 to report a home invasion

According to the documents, Ulfr left the home and dumped the clothes he was wearing and a key to Scarr's home in a dumpster at a nearby McDonald's. He then drove back to Scarr's house and realized she was dead.

The documents state that Ulfr shot himself in the foot and called 911 to report that an armed intruder had broken into the home.

In a 911 recording released in April Ulfr is heard telling the dispatcher that he came by the house to return her key and encountered an armed burglar. He said he was shot in the foot when he slapped the gun away from the intruder. He also said the burglar had fled through a sliding glass door in the back of the home.

At one point in the recording, the dispatcher tells Ulfr to take the duct tape off of Scarr's mouth and perform CPR.

'I don't have anything to take the duct tape off,' he responds, stuttering.

When deputies arrive, he's heard yelling for them to come to the back room.

Police said they knew Ulfr's story was not true because the burglar bar was still attached to Scarr's sliding door. They also found the same zip ties used to tie Scarr to her bed in Ulfr's rental car and the clothes he discarded in the McDonald's dumpster.

Surveillance video from Walmart also showed Ulfr purchasing the items he used to tie up Scarr.

Authorities said that Ulfr was upset that Scarr refused to date him and was seeing someone else

According to the documents, the nature of Ulfr and Scarr's relationship is unclear. Police initially said he was Scarr's ex-boyfriend, but family members said he briefly lived with her as a roommate and they also worked together at a restaurant.

He moved out of Scarr's home after friends said he showed up to her boyfriend's house and threatened her in mid-February. They also told detectives that Ulfr was violent towards Scarr and would yell and throw things at her, the Orlando Sentinel reports.

Authorities said Ulfr was upset that Scarr wouldn't date him and was seeing someone else.

Ulfr's mother told detectives that she checked him into a mental health facility in mid-March, less than a month before the murder, because he was threatening to kill himself. She also said he was briefly hospitalized because he claimed he was suffering from amnesia after hitting his head.

'I asked my brother if he felt bad and he said he felt bad for her family but he didn't feel bad about what he did yet,' Brown told detectives.

Ulfr was indicted first-degree murder and is facing the death penalty, according to the Orlando Sentinel. He's currently being held at the Seminole County Jail.