Speaking exclusively to Channel 4 News, Jack's parents John and Sally also said they were arrested when they sent their son money for glasses. Mr and Mrs Letts talked about Jack's condition, obsessive compulsive disorder (OCD), and said his conversion to Islam had helped him cope.
Marie Buchan keeps me waiting for nearly two hours. When she turns up for our interview, she is flustered "I'm sorry," she says "There was an incident near the school, I was just shouted at by a man I've never met before."
"We release this statement to confirm that, indeed we are in the Islamic State." Apparent confirmation, then, that three generations of one family from Luton have left their lives in the UK to go to Syria, writes Homes Affairs Correspondent Darshna Soni. The eldest, Muhammed Abdul Mannan, is 75 years old.
Our Home Affairs correspondent Darshna Soni has spoken exclusively to the brother who reported the family missing to the police. Police are now investigating one of the family's links to radicals who were once members of the now-banned al-Muhajiroun group. "I've been worried sick about my father, he's not in the best of health," Mohammed Akhtar Hussain told me.
Some of the best athletes in the world are arriving in Birmingham, ahead of this Sunday's Grand Prix event in the city, writes Channel 4 News Home Affairs Correspondent Darshna Soni. The event has been promoted by organising body British Athletics with posters declaring "Mo's Coming to Birmingham!"
"It's called an election...you know, you go and vote for who will be Prime Minister?" He is surrounded by a large crowd of young people, trying to explain what's happening in May. Wherever we go in Handsworth, Apache Indian is mobbed by people wanting to talk to him.
Ellekhlifi, who was killed in Aleppo in 2013, went to the same London secondary school as Mohammed Emwazi (Jihadi John), who was the leader of the so-called "Beatles". Channel 4 News has obtained video footage showing Ellekhlifi preaching on an Islamic stall on a west london street before he went to Syria.
Emwazi tape transcript While we were interviewing after... right at the end, he [Nick, the MI5 agent] said: I would like to ask you some serious questions now, and while I'm packing my pack... This is while I'm packing some of my stuff... I said to him: "Yeah, go on, ask it."
Haitham Al-Haddad who was due to speak to the university's Islamic Society told Channel 4 News that he hoped his speech would still go ahead. The controversial speaker who has previously reportedly described homosexuality as a "scourge" and a "criminal act", was due to give a speech entitled "Who is Muhammad?"
It's been claimed that Mohammed Emwazi grew up in a well-to-do family from west London. He graduated from University with a computer science degree - but what set him on the path to radicalisation? According to the advocacy group Cage, in 2009 Emwazi tried to go on safari with two friends in Tanzania.
Muck Rack makes it simple to find people, tweets, or articles that mention any name, keyword, company, hashtag etc. We've compiled this guide to help you make the most of your search.
Selecting a term
Start searching tweets, articles from media outlets, articles mentioned in tweets, journalists'
names, titles and bios with some suggested searches:
Companies or Topics (e.g. iPhone, Microsoft)
Phrases (e.g. "cloud computing") — use quotes to keep the terms together
Twitter handles (e.g. @username) — returns those who have mentioned or replied to
Names (e.g. David Pogue)
Hashtags (e.g. #sxsw, #london2012)
Bio details (e.g. vegan, Olympics, father)
Muck Rack's Advanced Search allows for many boolean operators.
Find results that mention multiple specified terms, use AND or
+. For example, ensure each result contains both politicians Barack Obama and Mitt Romney by
searching Obama AND Romney or Obama +Romney.
Use the operators OR or , to broaden your search when you'd like either of
multiple terms to appear in results. (This is the default behavior of our search when no operators
are used.) For example, search for democrat OR republican to find results that refer to
Democrats and/or Republicans.
Use NOT or - to subtract results from your search. For
example, searching Disney will yield results about the Walt Disney Company as well as Walt Disney
World Resort. To exclude mentions of Disney World, search for Disney -World or Disney
When using one of these operators with a phrase, enclose it in quotation marks. For example, you can
find results about smartphones excluding Apple's iPhone 4S by searching smartphone -"iPhone
Use parentheses to separate multiple
boolean phrases. For example, to find journalists talking about having fun in Disney World or
Disneyland, search for ("disney world" OR disneyland) AND fun.