Law enforcement agencies across Florida will be under stricter guidelines for the use of confidential informers under a bill Gov. Charlie Crist signed into law Thursday. The legislation is named for Rachel Hoffman, 23. The Florida State University graduate was killed while on an undercover drug buy for Tallahassee police a year ago. "It's just a great day for Rachel's cause and memory," said her father, Irv Hoffman of Palm Harbor. "Rachel's Law" calls on agencies to take into account a person's age and maturity, emotional state and the level of risk a mission would entail. Police also would be barred from promising an informer more lenient treatment. Not included are several provisions Hoffman's parents said could have prevented their daughter's death, including barring anyone in a drug treatment program, as Rachel was, from going on undercover drug buys. To read previous coverage, go to links.tampabay.com.