Crimestoppers and Sussex Police are offering the money for information leading to the arrest and conviction of Valerie Graves' killer.
Man Jailed For Trying To Incite Riot
A man who used Facebook to try to incite violence and urged others to attack the police and Muslims during the height of last summer's riots has been jailed for three years.
He made three posts on his personal page of the social networking site on August 9 starting with the words:
''When are we going to start the Southampton riots then?''
When told to shut up by a friend, he replied: ''LOL - do a few coppers in.''
He then made another post, which said: ''**** them. Hardly can do **** all if we get loads together and have a right go. And why we are at it - the muslim revolt: give it to those ***** as well.''
The posts, which could be accessed by anyone, were made during widespread rioting in Birmingham, Manchester, Derby, London and Liverpool.
Stancombe, from Totton near Southampton, denied the charge under section 44 of the Serious Crime Act 2007.
He told the jury his posts on his Facebook wall had been ''blown out of proportion'' and were ''stupid and immature'' and he did not intend for a riot to take place.
Stancombe's barrister Mark Ashley called his actions a ''stupid and foolish few minutes of his life''.
Hampshire police had been monitoring sites like Facebook during the riots and Stancombe was arrested.
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