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A north Georgia high school teacher was arrested on Wednesday after he barricaded himself in a classroom and fired a shot from his handgun out of a window, police said.No one was injured in the incident at Dalton High School, except for a student who injured an ankle running through the school, police spokesman Bruce Frazier said.The shooting about 85 miles north of Atlanta heightened the already tense debate around guns in schools in the wake of the deadly mass shooting in Parkland, Florida two weeks ago.The incident began about 11:30 a.m. when Randal Davidson, a 53-year-old social studies teacher, refused to let students into his classroom, Frazier said. When the principal put a key in the door in an attempt to enter, Davidson fired a shot from a handgun through an exterior window of the classroom, according to Frazier.The school immediately went into lockdown, and police quickly arrived and evacuated the immediate area around his classroom. After about 30 to 45 minutes, Davidson agreed to surrender to authorities and was taken into custody without further incident, Frazier said.Frazier said there was no evidence that Davidson was trying to fire at anyone."It certainly seemed like he didn't have any intention to harm anybody else," Frazier said.Davidson had been a teacher at Dalton since 2004 and was the play-by-play radio announcer for the high school's football team, Frazier said. Police did not release any explanation as to a possible reason for what happened.President Donald Trump and the National Rifle Association, among others, have proposed that teachers should be allowed to bring firearms into schools to defend against possible attacks. But critics have said arming teachers would create a host of other dangerous side effects -- and pointed to the Dalton shooting as Exhibit A in that argument.The-CNN-Wire? & ? 2018 Cable News Network, Inc., a Time Warner Company. All rights reserved. 1937

A starting point for investigators trying to trace the bombs sent to Democratic figures and CNN this week: the postmark.But in some cases, it appears to be a missing clue.The postmark typically indicates when and where the mail was sent from and is marked over the stamps -- "canceling" them, and preventing the stamps from being reused. Unlike stamps, most of which cannot be traced, the impression left by a postmark or mail meter is distinctive and can help investigators focus their search.A postmark is visible in a photo of at least one of the packages seen by CNN. A postmark is not visible in photos of several other packages shared with CNN -- only adding to the questions about their origins.The lack of a postmark is very rare, according to Nancy Pope of the National Postal Museum.A postal inspector who spoke to CNN on the condition of anonymity indicated it would be very unusual for a piece of mail to leave the facility where it was dropped off for delivery without such a mark.That could indicate that a sender or senders were working in multiple diverse geographical areas, including New York, Washington, Florida and California.Another source told CNN it is possible some of the stamps may not have been canceled because of the package's soft sides and odd shape, which would make it difficult to stamp.The US Postal Service's website also says mail may not be postmarked if it was processed through a meter or if the postage was paid by permit or precanceled stamp. None of those appear to apply to this situation.Adding to the mystery are post office markings on one of two packages sent to former Vice President Joe Biden indicating the stamps on the package did not cover the cost of the delivery, and additional postage is due.That suggests the package was weighed at some point during the shipping process, a former postal inspector told CNN.It was unclear from the photo whether that package had been postmarked.Postmarks can be applied by machine and by hand, depending on how a piece of mail is sent, according to the Postal Service. When mail is run through an automated system at a processing distribution center, the postmark is applied, and the mailed item is screened by a biohazard detection system.It was not clear why postmarks were not visible on several of the packages, and the US Postal Inspection Service provided a statement to CNN that did not address the question."The U.S. Postal Service has developed a comprehensive approach to protecting the mailsystem by utilizing a targeted strategy of specialized technology, screening protocols and employee training," read the statement.The statement noted its Dangerous Mail Investigations Program includes law enforcement officers who "are trained to recognize the common characteristics of suspicious mail and are highly proficient in the use of state-of-the-art equipment to include portable X-ray machines." 2907

A student's biggest dream is to walk across the stage during their school's commencement ceremony; getting rushed off the stage is not.This was the case for a number of African-American students at the University of Florida's ceremony on Saturday.As students were called up to receive their diplomas, some decided to perform a quick celebratory dance. But a faculty member didn't find the performances to his liking, and forcibly rushed the graduates off the stage. 473

A Marin County, California doctor says his research into medical marijuana has identified a compound that can help diabetes patients.Dr. Michael Moskowitz, President of Bay Area Pain Medical Associates, says it’s not about getting high, it’s about getting well – and he thinks he’s on to something.Moskowitz believes he has identified a rare component of marijuana called THCV that he says is helping one of his diabetic patients – a patient who’s blood sugar level varies between 50 and 1000 in a single day.“It’s not clear, but it appears that, on a preliminary basis, for the first month that he did that, the extent of how much he varied seems to be less,” said Moskowitz.THCV is found in a strain of marijuana called Black Beauty. It’s leaves are much darker than most marijuana.Although she doesn’t have diabetes, Nina Murphy has chronic neck and back pain she used to treat with traditional pain medication. “I was a little skeptical. I haven’t used marijuana before so it’s not something I was just going to jump into,” said Murphy. “I’m extremely pleased and I hope to off my meds in the next couple months so, yeah!”Moskowitz says more study needs to be done with Black Beauty. “Just having the opportunity to work with something that clearly has therapeutic value, but figuring out how to optimize that and make that work the best for the most number of people is very exciting,” he said.Moskowitz will travel to Miami next week to speaking at a conference to discuss his findings. 1500

A two-year audit of Facebook's civil rights record found "serious setbacks" that have marred the social network's progress on matters such as hate speech, misinformation, and bias. The audit's leader, former American Civil Liberties Union executive Laura Murphy, was hired by Facebook in May 2018 to assess its performance on vital social issues. The final, 100-page report released Wednesday outlines a "seesaw of progress and setbacks" on everything from bias in Facebook's algorithms to content moderation, advertising practices, and voter suppression."The purpose of this Audit has always been to ensure that Facebook makes real and lasting progress on civil rights, and we do believe what’s listed below illustrates progress," Murphy said in the audit. "Facebook is in a different place than it was two years ago — some teams of employees are asking questions about civil rights issues and implications before launching policies and products. But as I’ve said throughout this process, this progress represents a start, not a destination. While the audit process has been meaningful and has led to some significant improvements in the platform, we have also watched the company make painful decisions over the last nine months with real-world consequences that are serious setbacks for civil rights."In a news release, Chief Operating Officer Sheryl Sandberg said that the release of the audit couldn't have come at a more important time. "Facebook stands firmly against hate," Sandberg said in the release. "Being a platform where everyone can make their voice heard is core to our mission, but that doesn’t mean it’s acceptable for people to spread hate. It’s not. We have clear policies against hate — and we strive constantly to get better and faster at enforcing them. We have made real progress over the years, but this work is never finished and we know what a big responsibility Facebook has to get better at finding and removing hateful content."The audit's recommendations are not binding. 2011