It's alleged the suspect in the PC Blakelock murder wrote a rap about the killing while serving a sentence for affray. Nicholas Jacobs is alleged to have written:
"Me have de chopper we have intention to kill an police officer PC Blakelock..."
The rap went on "he beg for mercy but it didn't matter.. him get capture. Him have to face consequences."
More top news
Metropolitan Police officer, Tom Harrison, has been crawling the course since the race began on Sunday morning.
The Old Bailey heard how Syed tried to get weapons online, including a bomb vest, and trawled the web to find a busy area launch an attack.
Hours after completing Sunday's course some of the runners put their medals on auction site eBay, with one attracting bids of almost £92.