PORT ARTHUR - Scott Lawrence - KFDM has obtained a probable cause affidavit revealing new details about the murder of a Port Arthur nightclub owner, including how police believe the man charged with the shooting waited behind a dumpster before the businessman was ambushed and shot.

Click here to read the entire affidavit obtained by KFDM News

According to the court document, a man police describe as an accomplice admitted to the crime and provided key information and evidence linking the prime suspect to the murder.  

Hieu Huyen, 62, was shot and killed at about 2 a.m. Saturday outside of his nightclub, Nikki's Lounge, in the 53 hundred block of Gulfway.  Police have charged Brandon Dinh Tran, 18, and Darren Anthony Oliver Junior, 18, with capital murder.

In the affidavit, police say Huyen exited the lounge at closing time. While Oliver acted as a lookout, Tran remained armed and concealed behind a dumpster, lying in ambush, according to the document. When Huyen walked out, Tran rushed from his hiding place behind the dumpster and charged Huyen with a handgun.

Police say security video shows when Tran ambushed Huyen, Huyen ran away from the lounge in an effort to escape from Tran. Investigators say the video shows Tran pursuing Huyen with a handgun held out in front of him in a tactical one-handed shooting position with the pistol pointed at Huyen. Both Huyen and Tran disappear from the view of the video camera with Tran in close pursuit of Huyen. Investigators say Tran shot Huyen near his ribcage and Huyen collapsed. Police say Tran walked up and shot Huyen at least twice more in the head. Justice of the Peace Brad Burnett has ordered an autopsy and is waiting for a final report. 

The victim's wife wasn't hurt. Huyen was holding the couple's small white dog. It received a minor injury to its leg.

The man police describe as the accomplice, Darren Oliver, was identified through the investigation. Officers went to his home and spoke with him. They say he immediately began confessing to the events surrounding the robbery and murder.

Police say Oliver allowed them to search his home and they found a credit card with Tran's name on it. They also saw a Walmart card and Lone Star card Oliver said belonged to Huyen. Investigators say Oliver told them the cards were given to him by Tran as Oliver's portion of the proceeds from the robbery.

According to investigators, Oliver described the clothing he was wearing on the night of the killing and pointed it out. They say it matches the clothing the lookout in the video was wearing. 

Police say Tran took Huyen's wallet and some jewelry.

Tran confessed to the shooting during a statement to reporters following his arrest Monday. Officers arrested Oliver on Saturday. 

"There wasn't any reason to do this, but why do any criminals do what they do?" Marcelo Molfino, one of the lead PAPD officers in the case, told KFDM News on Tuesday. "You can't get in someone's head. Unfortunately, there's people who are like this and there are laws in place to deal with people like this, and the work that was done here by Port Arthur P.D., Bridge City and Houston is what law enforcement is here to do-serve the community."