The surveillance footage from Club Envy shows three friends drinking, laughing, hugging and having a good time.
At 1:45 a.m. July 8, 2007, the camera catches Guadalupe "Lupita" de la Cruz, 23, leaving the club.
One hand is clasping the hand of her boyfriend, Brian Brown; the other one, Marco Glaser's.
Less than an hour later, Glaser put a gun in Brown's face and pulled the trigger twice, Deputy Pima County Attorney Kellie Johnson told jurors Thursday.
He then shot de la Cruz in the right side and in the back of the head, Johnson said.
Thursday was the first day in Glaser's trial. If convicted, the 31-year-old man could be eligible for the death penalty.
Defense attorney Richard Parrish told jurors there is "no evidence whatsoever" that Glaser killed his friends.
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A second surveillance tape, from the parking lot where the killing took place, is useless, and three people who contend they saw his client covered in blood couldn't pick him out of a photo lineup, Parrish said.
Somebody shot the couple after Glaser left them, Parrish said.
Johnson told jurors that the victims and Glaser spent a couple of hours at Club Envy, a now-closed bar on East Speedway, before deciding to join friends at Brown's house. They left the club in de la Cruz's mother's Dodge Stratus.
Shortly before 3 a.m., a woman's body was found sprawled in a parking lot on Broadway near Wilmot Road.
A short time later, Tucson police officers were flagged down at the Prince Road and Interstate 10 substation.
Two men, both named Garcia, told that the officers they'd been chased away from their friend Brian Brown's east-side house by an acquaintance they'd met earlier that night at Club Envy.
The man, whose name they couldn't recall, was armed and covered in blood, the Garcias told the police.
They also told police that when they went back to the house a few minutes later, they found Brown's bloodied cell phone under some bushes. They didn't know where Brown was, and de la Cruz wasn't answering her cell phone.
When police tried de la Cruz's number, the pink cell phone next to the body at a Best Buy store rang. When they arrived at Brown's house, they found him dead inside the Stratus inside the garage.
Miguel Garcia testified they gave police photographs they'd taken that night at Club Envy.
In one photo, Brown, de la Cruz and Glaser smile for the camera.
It was those photos that helped police identify Glaser, who was arrested a few days later trying to re-enter the United States from Mexico using his brother's name.
Judge Charles Sabalos of Pima County Superior Court is presiding over the trial.
Contact reporter Kim Smith at 573-4241 or kimsmith@azstarnet.com
