Second man charged with murder over death of Kelly Wilkinson

Detectives have charged a second man with murder over the death of Gold Coast mother Kelly Wilkinson.

Police arrested Bradley Bell, 25, at a Coomera business just after 9am today. 

Detective Inspector Chris Ahearn this afternoon said police would allege he assisted and drove Ms Wilkinson's ex-partner, Brian Johnston, 34, to her Arundel home before the murder.

"He was involved in transporting (on) the morning of the murder and was involved in procuring fuel that was used," Detective Inspector Ahearn said. 

"They did stop at a service station and obtain a jerry can." 

Ms Wilkinson's badly burnt body was found in the backyard of her home on April 20.

Mr Johnston was found injured nearby, also suffering from serious burns.

Police will allege Mr Bell knew about what Mr Johnston was planning. 

Mr Bell was not believed to be known to Ms Wilkinson or her family. 

"He aided Kelly's estranged husband with committing a number of acts that helped him to commit the murder," Detective Inspector Ahearn said. 

"We'll allege that he knew what the end result was going to be." 

Mr Bell was initially interviewed by detectives in the days after Ms Wilkinson's murder, with his version of events allegedly disproven by the police investigation. 

"He had a version at the time, additional investigations have been able to discount that version," Detective Inspector Ahearn said. 

Mr Johnston was charged with murder in the days following Ms Wilkinson's death. 

Mr Bell has been refused bail and will appear in the Southport Magistrates' Court tomorrow.