Grand Jury Keeps Ferguson on Edge The grand jury investigating the killing of Michael Brown by Ferguson, Mo., police Officer Darren Wilson is not meeting this weekend and will reconvene Monday, sources told ABC News. Speculation that a decision on whether to indict Wilson in the shooting was coming soon has increased tensions in a town that already was on edge. Protesters have been demanding that Wilson be charged with murder for the Aug. 9 shooting of Brown. The Saint Louis County Police Department confirmed today that beginning at 6 p.m. CT, they are switching their officers to 12-hour shifts. Metal and concrete barricades have been erected in areas around the St Louis County government buildings in Clayton, where the grand jury has been meeting. The justice center there also houses the prosecutor's office, the St. Louis County Police Department headquarters and the circuit courts. Preparations are being made there for specific areas for anticipated protests. There also appeared to be some minor increase in activity behind the strip mall in Jennings, the town next to Ferguson, where the Unified Command will be operating once they are notified a decision has been reached. A lawyer for the Brown family described the city Friday as "nervous, on edge, scared" as people await the grand jury's decision. "The city is really in a panic at this moment," attorney Anthony Gray said. The manager of Beauty Town Plus, a salon on West Florissant Avenue where much of the protests centered during the summer, told ABC News that they decided to board up because their windows were broken three times following Brown's death. On Friday, federal authorities in Missouri charged two men with lying on forms to purchase guns ahead of the grand jury decision. Olajuwon Davis and Brandon Baldwin faced only those charges as of late Friday, but sources told ABC News that authorities were looking into whether they tried to acquire ready-made explosives and other weapons ahead of the decision, which is expected soon. Both Attorney General Eric Holder and Michael Brown Sr., the slain teenager's father, have released videos urging protesters to remain peaceful when the grand jury's decision is handed down.