ABILENE, Texas -

An Abilene man is behind bars on a first-degree felony murder charge in connection to the death of 41-year-old Matthew Augustadt.

Alan Bart-Dean Deax, 37, was booked into the Taylor County Jail Saturday night. Jail records show he lived just a few houses down from Augustadt, who collapsed at his South 23rd Street home March 12. A preliminary autopsy showed Augustadt suffered trauma to the head and had two skull fractures.

Abilene police called a press conference Thursday seeking the public's help in identifying two people who had talked to Augustadt the night of his death. In a statement released Monday, police confirmed Deax was one of those people.

Deax was arrested without incident at an oil rig in Big Lake, about 70 miles west of San Angelo, Saturday afternoon. Police said Deax and Augustadt were allegedly involved in a physical altercation on March 10.

Abilene police tell KTXS that Deax was arrested in Big Lake, which is about 70 miles from San Angelo. As of Monday, Deax remains in jail with bond set at $250,000.

The following is an APD press release issued Monday regarding the arrest:

"As reported by local media, the Abilene Police Department (APD) held a news conference on March 13, 2014, seeking the public’s assistance in identifying two persons of interest that were present when Matthew S. Augustadt, now deceased, was injured at his residence in the 3100 block of South 23rd Street. As reported, Mr. Augustadt died at a local hospital on March 12th from sustained trauma that is now characterized as a criminal homicide.

Since then, both persons of interest at the crime scene have been identified. One of these persons was identified as Alan B. Deax (DOB: 05/16/76). Based on information gleaned from the investigation, detectives with the Criminal Investigation Division sought and obtained an arrest warrant which was executed on March 15, 2014. Detectives learned that Deax had left Abilene and was working on an oil rig near Big Lake, Texas, Reagan County, some 70 miles west of San Angelo. A group of detectives and tactical unit officers from APD drove to Big Lake and contacted the Reagan County Sheriff’s Office for their assistance.

Investigators confirmed that the rig site was located approximately 13 miles northwest of Big Lake. Accompanied by Reagan County Sheriff Deputies; a Texas Game Warden; and a Department of Public Safety Trooper; APD personnel secured the rig facility and located Deax in the early afternoon hours of March 15th. Deax was taken into custody without incident and taken before a Reagan County Magistrate. Deax was arrested for 1st-degree felony Murder. His bond was set at $250,000 and he was extradited back to Taylor County for questioning. The investigation revealed that Deax and Augustadt had been involved in a physical altercation on the evening of March 10th that led to Augustadt’s injuries during the assault.

APD is still awaiting final autopsy results from the Tarrant County Medical Examiner’s Office.

This case will be forwarded to the District Attorney’s Office for their consideration of charges."

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Abilene police are investigating the death of a man who died of head injuries.

According to investigators, 41-year-old Matthew Augustadt was taken to the hospital late Tuesday March 11 after he collapsed at his home in the 3100 block of South 23rd Street.

Augustadt died Wednesday.  An autopsy determined the cause of death was trauma to the head, two skull fractures, one of them fatal.  The trauma was not visible externally.

Augustadt's mother told police she arrived home about 8 p.m. Tuesday and saw Matthew under the carport with a white female and male.  She did not know the two.  She called 911 later that evening when Matthew collapsed at their home.

Police are seeking the public's help in identifying the two people who may have been with Matthew that night.  The mother says the white male was in his 30s or 40s.  The female appeared to be in her 30s.  They might not be involved with his death but authorities would like to question them.

If you have any information that would help, please call Abilene police.