The approximate time for jury deliberations on famous cases from How long did the juries of these big trials deliberate? by Alice Feigel at HLNtv.com and updated most recently with Jodi Arias and Brett Seacat:
4 hours : O.J. Simpson (acquitted)
4 hours : Steven Hayes (guilty)
6 hours : Brett Seacat (guilty)
7 hours, 33 mins : Jodi Arias (guilty)
9 hours : Conrad Murray (guilty)
10 hours, 40 min : Casey Anthony (acquitted)
14 hours : Drew Peterson (guilty)
20 hours : Jerry Sandusky (guilty)
30 hours : Phil Spector (guilty)
35 hours : Robert Blake (acquitted)
4 days : Menendez brothers (guilty)
7 days : Scott Peterson (guilty)