PICTURED: Oakland grandfather, 77, who is being probed for murder after 'shooting dead burglar who broke into family's home'

The California grandpa arrested on suspicion of murdering a home-invasion robber has been released from jail pending an investigation into the fatal shooting. 

DailyMail.com has obtained the mug shot of Greg Ravara, who was booked on Monday at Alameda County jail. The 77-year-old grandpa looked stone-faced and unshaven as he wore blue jail garb after spending four days in lock up.

Ravara was not identified by Oakland Police during a press conference on Wednesday. 

But officials said witnesses saw two men and a woman break into the shooter's home at 98th Avenue and Burr Street in East Oakland shortly before 6 p.m. on July 10.

At least one of the would-be robbers was armed with a crowbar, according to Acting Deputy Chief Frederick Shavies.

The homeowner confronted the suspects when one of them tried to scale his back fence, Shavies said.

When police arrived at the East Oakland home, the vigilante grandpa was still pointing the gun at one female suspect, while another man in his 40s lay on the ground wounded just inside a back fence.

The woman told cops the homeowner shot her friend, according to court documents. A gun was collected at the home.

Oakland firefighters and paramedics tried to save the suspect, but he died at the scene.

Shavies said the homeowner was taken into custody because he did not immediately provide a statement to cops. 

'Absent any sort of statement, if ‘A’ shoots ‘B’ without an explanation, we can only go with what we have,' Shavies said. 'All we know is an individual lost his life.'

The third burglary suspect, a 31-year-old man, fled the home but was arrested by cops a few blocks away, according to court documents. 

The Alameda County Coroner's Bureau would not release the name of the suspect who was fatally shot and referred the case back to Oakland Police.

The 77-year old grandpa appears to have no criminal record. In pictures on his social media, Ravara could be seen enjoying trips with his family.

In one of his posts, a smiling Ravara commented, 'One day at a time, another sunrise to enjoy, do today like there is no tomorrows.'  

On Wednesday, Shavies said the case was turned over to Alameda County DA Pamela Price for consideration. As of Friday afternoon, the progressive DA had yet to file charges against Ravara.

Under the California law called 'Castle Doctrine,' a homeowner is permitted to use force against intruders who try to bust their way in. 

Former Los Angeles County District Attorney Steve Cooley told DailyMail.com prosecutors must weigh varying factors - whether the intruder was coming into the property or was on his way out - when Ravara pulled the trigger.

'You have to look to see whether or not there are any facts that would support a reasonable man exercised his right to self-defense or defense of a third party,' Cooley said. 'That being said, in Alameda County, who knows? It is a weird place.

'They have a radical, left-wing ideological district attorney. And just like other radical prosecutors whom George Soros has gotten elected, the law doesn't seem to matter much to them.'