Operate computers, including word processing software; read reports, letters and memos; write reports, letters, and memos; perform investigative work; interview and interrogate suspects, victims, and witnesses; analyze data; reason and draw conclusions; operate office equipment such as facsimile machine and copy machine; safely handle firearms; communicate effectively, both orally and in writing; and maintain effective working relationships with co-workers, attorneys, and personnel of other law enforcement agencies. Investigates criminal offenses, including following-up on tips from informants, preparing affidavits of probable cause, taking statements and confessions, preparing investigative reports, and preparing cases for prosecutors; draws up complaints for search warrants; prepares and serves search and arrest warrants; assists public in reporting crimes; testifies in court; and assists other law enforcement agencies with investigations.