Kotlowski said that police continue to focus their investigation on the boy’s home and the individuals that may have seen or had contact with Andrew last. The Crystal Lake Police Department also called in 15 police agencies, along with 4 drones, to assist with a coordinated search of the area, Kotlowski said. At 6 p.m. Thursday, boat and sonar technicians from fire departments in Lake and McHenry counties were called to help search Crystal Lake, police said.