Sometime after midnight on Saturday, June 17, 1972, Watergate Complex security guard Frank Wills noticed tape covering the latches on some of the complex's doors leading from the underground parking garage to several offices, which allowed the doors to close but stay unlocked. He removed the tape, believing it was nothing. When he returned a short time later and discovered that someone had retaped the locks, he called the police. Responding to the call was an unmarked car with three plainclothes officers (Sgt. Paul W. Leeper, Officer John B. Barrett, and Officer Carl M. Shoffler) working the overnight "bum squad"—dressed as hippies and on the lookout for drug deals and other street crimes. The burglars' sentry across the street, Alfred Baldwin, was distracted watching TV and failed to observe the arrival of the police car in front of the hotel. Neither did he see the plainclothes officers investigating the DNC's sixth floor suite of 29 offices. By the time Baldwin finally noticed unusual activity on the sixth floor and radioed the burglars, it was already too late. The police apprehended five men, later identified as Virgilio Gonzalez, Bernard Barker, James McCord, Eugenio Martínez, and Frank Sturgis. They were charged with attempted burglary and attempted interception of telephone and other communications. "The Washington Post" reported that "police found lock-picks and door jimmies, almost $2,300 in cash, most of it in $100 bills with the serial numbers in sequence ... a short wave receiver that could pick up police calls, 40 rolls of unexposed film, two 35 millimeter cameras and three pen-sized tear gas guns".