Harrowing footage shows a smirking killer moments before he brutally murdered a 'gentle' grandmother in her own home. 
Murderer Madni Ahmed, 20, was caught on camera creeping into the home of Riasat Bi and drawing a 'Rambo' knife. 
The frenzied attack also saw Ahmed knife her grandson as he slept at a home in Small Heath, Birmingham, on July 12 last year. 
The clip was released by West Midlands Police, Birmingham Live reports. 
The crazed killer, from Stoke on Trent, launched the frenzied and motiveless attacks after buying knives online using his brother's ID. 
Madni Ahmed, 20, was caught on camera creeping into the victims' home 
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He was found guilty of murder, attempted murder, being in possession of an offensive weapon and affray after a trial at Birmingham Crown Court. 
Ahmed was sentenced to life in prison and ordered to serve a minimum term of 36 years today. 
CCTV footage shows the remorseless killer casually don a pair of plastic gloves while heading towards Riasat's home. 
Ahmed is then shown calmly trying to enter the property using a side entrance, but fails. 
Madni Ahmed, was jailed for at least 36 years for the murder (Image: SWNS) 
Victim Riasat Bi was murdered in her own home in Birmingham (Image: SWNS) 
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He walks back towards the house and instead creeps in through an open front door - pulling the huge 'rambo' knife from his trouser pocket as he steps inside. 
There, he stabbed Riasat Bi’s 18-year-old grandson 15 times as he slept in the front room of the family home, before fatally knifing her. 
Ahmed was today given a life sentence at Birmingham Crown Court 
She was left with more than 25 injuries after the horrific attack. 
He then continued upstairs where he was met by another grandson who ordered him to leave before grabbing a knife in self-defence. 
Ahmed refused to leave and following a scuffle he received a slash wound to his arm. 
CCTV footage shows Ahmed entering the home 
The killer fled the house via the attic window, ditching his knife in the roof guttering before jumping into a neighbour’s garden. 
Ahmed’s blood was later found on the fence panels as he stumbled through the garden and into a neighbour’s house, grabbing a knife from the kitchen. 
Ahmed carried out the frenzied attack in July last year 
He made his way down Coventry Road before ditching his blood soaked clothes on Malmesbury Road. He had called a taxi to collect him from The Akers Trust to take him back to a hostel in Newtown. 
However, later that evening, Ahmed was arrested at a hospital in Stoke-on-Trent after detectives traced the phone he had been using throughout the day. 
Ahmed is seen drawing a knife in the chilling clip 
The court heard Ahmed's own father had gone to police to say his son could have been involved after hearing about the murder and seeing Whatsapp footage of the killer leaving the scene. 
Speaking after the case, Miss Bi's daughter - who asked not to be named - told how the tragedy had 'devastated' the close-knit family. 
She said: "My mum had three children and six grandchildren - the youngest is only four. 
"We have tried to stay strong and positive for the children - we want them to know whatever they are going through we will be there for them. 
"I was so very close to my mom - I saw her every day. 
"She was so gentle and kind and had no enemies - she was loved by everyone. 
The footage shows Ahmed shortly before the brutal murder 
"She wasn't just our mom - she was a mom to so many other people. 
"She didn't have a bad bone, she loved and cared for everyone she met." 
Detective Inspector Harry Harrison, from Force CID, said: “This was a pre-meditated attack, with Ahmed intent on killing someone that day by taking a knife to the home of an elderly lady. 
The footage was taken moments before the attack 
“Ahmed claimed that he was looking for someone at the address and when he couldn’t find who he was looking for, he attacked Riasat’s grandson while he was sleeping, leaving him with life changing injuries. He then went on to carry out a horrifying attack on a defenceless elderly lady. 
“This was a horrendous and violent attack and although no sentence will ever compensate for what Ahmed has caused this family, I hope they can find some closure in that justice has been served today." 
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