Actor Ricardo Medina, Jr. has been released from jail after Los Angeles prosecutors decided not to pursue murder charges against him following the death of his roommate.

The former Power Rangers star was arrested in Palmdale, California on Saturday (31Jan15) after allegedly stabbing Joshua Sutter with a sword.

Police investigating the incident discovered the pair had become embroiled in a heated argument, which ended in Sutter's death after he forced open the door of Medina's bedroom.

On Tuesday (03Feb15), officials announced they had declined to charge Medina, Jr. with murder, but had asked sheriff's investigators to look into the matter further to determine if any other charges should be considered.

The 37-year-old actor, who portrayed the Red Ranger on Tv series Power Rangers Wild Force, has since been freed from custody and has expressed his sympathies to the victim's relatives, saying, "I want to say I am very, very, very sorry for what occurred. I'm very happy to be out of jail and my heart goes out to the Sutter family. Thank you."

Meanwhile, his attorney Allen Bell insists his client will be exonerated because he was just defending himself against his angry roommate.

He says, "There simply aren't facts here for a crime. It is a self-defence case. It's been a self-defence case. You have an individual here that was the victim of a beating in the kitchen area before he went to the bedroom and closed and locked the door in order to secure himself from any continuing violence."