Los Angeles Police Department officers carry the casket of LAPD Officer Houston R. Tipping at the beginning of his memorial service on Wednesday, June 22, in Los Angeles. Carolyn Cole/AP hide caption toggle caption Carolyn Cole/AP Law An LAPD officer who was killed in a training exercise was targeted, a lawyer alleges October 8, 2022 "They used that training as a cover to kill him in retaliation for his whistleblowing activity," attorney Bradley Gage told NPR. Officer Houston, who died in May, was investigating an alleged rape.