LOS ANGELES —  Two former police officers were convicted in federal court Wednesday of participating in a robbery ring that disguised home invasions as drug raids.

William Ferguson, 35, a former Los Angeles policeman, and his 33-year-old brother, Joseph, a former Long Beach officer, were convicted of charges including conspiracy to deprive people of their rights under color of law and conspiracy to possess marijuana and cocaine.

William Ferguson was found guilty of 13 charges and acquitted of five counts. His brother was convicted of three counts. Jurors deadlocked on 18 other counts.

Defense attorneys said they would appeal. Prosecutors did not immediately say whether they would retry the brothers on the deadlocked charges. Sentencing was set for April.

Prosecutors said the ring conducted about 40 robberies from 1999 to 2001 in which members would steal cash and drugs, then sell them on the street.

Fifteen people, including the ring's suspected leader, former LAPD Officer Ruben Palomares, have pleaded guilty in the investigation. Palomares worked with William Ferguson in the LAPD's scandal-tinged Rampart Division until both were fired in 2003. He testified against the brothers at trial.