The three drifters accused of two murders, the first of a Canadian backpacker in Golden Gate Park and the second of a yoga instructor on a hiking trail near Fairfax, remain baffling to the public and to authorities as they face charges. Robbery, however, appears to be the motive in both killings.

One fact in the cases has been confirmed to the Chronicle and the Examiner. The gun the group allegedly used in both shootings was stolen from a locked box in an unlocked Fisherman's Wharf vehicle late September 30th or early October 1st. And the public is outraged that another stolen gun in Fisherman's Wharf has led to a death, recalling the murder of Kate Steinle at Pier 14 under similar circumstances.

“San Francisco has an auto burglary problem,” Cmdr. Toney Chaplin said Friday. “I’m telling everyone, if you don’t lock your car then someone is going to be in it. If you have a firearm, leave it at home. Secure it at home somewhere.”

Other news outlets are also starting to wonder if the trio, about whom very little is known, could have been responsible for other crimes in the area before their arrest in a stolen car at a Portland soup kitchen.

"These three individuals, I believe, have chosen to stay off the radar," Lt. Doug Pittman of the Marin County Sheriff's Office told ABC7, noting that none of the suspects had a driver's license or state ID card. "Because of that we're having to take a lot of extra steps to confirm who these people have been and beyond that, their activities and their life leading up to this point," he added.

23-year-old Morrison Haze Lampley, 24-year-old Sean Michael Angold and 18-year-old Lila Scott Allgood were arrested after the Marin County Sheriff’s Department used GPS to trace Carter’s 2003 Volkswagen Jetta, which had been stolen near the scene of his death, to just outside a Portland Catholic church soup kitchen, Marin County sheriff’s Lieutenant Doug Pittman says.

ABC7 also had the following sleuthing to report:

According to her Facebook page, Alligood went to high school in Hawaii. According to their records, a school official we spoke with there says she was born in Santa Barbara County and attended schools in Hawaii and most recently San Diego. By phone a relative told ABC7 News that Alligood had problems growing up, including with drugs. Also that she fell into the wrong crowd and left home at 18... Lampley previously faced stolen vehicle and stolen dog charges. Even less is known about Angold.

Previously: 'Lost Souls' On Crime Spree Allegedly Killed Woman In Golden Gate Park Saturday, Marin Hiker Monday