At 11:38 pm on the night he died, Luna left the Baltimore courthouse and went northeast on I-95. He used his E-ZPass on I-95 into Delaware but not on the New Jersey and Pennsylvania Turnpikes. After three toll interchanges, he switched to buying toll tickets. At 12:57 am, $200 was withdrawn from Luna's bank account from the ATM at the JFK Plaza service center near Newark, Delaware. At 2:47 am he crossed the Delaware River toll bridge to the Pennsylvania Turnpike, and at 3:20 am his debit card bought gas at the Sunoco King of Prussiaservice plaza. At 4:04 am his car exited the turnpike at the Reading-Lancaster interchange. The toll ticket had a spot of his blood on it suggesting that he was already injured. His car was parked at the back of the Sensenig & Weaver Well Drilling company at 1439 Dry Tavern Road, Denver, Pennsylvania before it was later driven into the creek. At 5:00 am the first employee of Sensenig & Weaver arrived, and half an hour later at 5:30 am the car was noticed, with its lights off and the front end into the stream. Blood was smeared over the driver's door and the front left of the car. Luna was face down in the stream under the car engine. He was wearing a suit and a black overcoat with his court ID around his neck. A pool of blood was found on the rear seat floor. Although stabbed 36 times with his own pocketknife around the chest and neck plus a head injury, the death was due to drowning. No suspects or motive for murder were determined. The federal authorities lean toward calling it a suicide and came to the conclusion he was alone from the time he left his office until his body was found, but the local Lancaster County authorities, including two successive coroners, ruled it a homicide. Additional evidence collected during the investigation captured a second blood type and a partial print, as well as some grainy footage from near the time of the gas station purchase made with Luna's credit card at the Sunoco service plaza. The investigation remains ongoing, and there is an unclaimed federal reward of $100,000 for information leading to a conviction.
Theories
Suicide
It was initially reported that Luna did not have the expected substantial defense wounds on his hands and that many of the wounds are shallow which are called "hesitation" wounds in a suicide victim. Some suggested motives for suicide were that Luna was to take a polygraph test concerning $36,000 which disappeared from a bank robbery case that he had prosecuted. Luna had a charge card which his wife, Angela, did not know about. His name was on an Internet dating site and he had a $25,000 credit card debt. There is also an accidental suicide theory that Luna was fabricating a kidnapping and attack and that he went too far.
Homicide
The Lancaster County coroner who performed the autopsy ruled Luna's death a homicide by drowning. Luna left his glasses, which he needed to drive, and his cell phone on his desk. He had called defense attorneys earlier in the night saying he would fax over documents that night but they never arrived. The pool of blood in the back seat would suggest Luna was in back and someone else was driving.
Inquest
In early February 2007, a private investigator and an attorney, both hired by Luna's family, filed a petition for a writ of mandamus in order to force the Lancaster County coroner to conduct an inquest into Luna's death, after an earlier request was declined.
