5 months to investigate

87. All investigations of complaints shall be completed in a timely manner, taking into account: (a) the investigation's complexity; (b) the availability of evidence; and (c) overriding or extenuating circumstances underlying exceptions or tolling doctrines that may be applied to the disciplinary limitations provisions (i) applicable to LAPD officers and (ii) applicable to many other law enforcement agencies in the State of California. The parties expect that, even after taking these circumstances into account, most investigations will be completed within five months.

in reference to: Civil Rights Division Home Page (view on Google Sidewiki)