PHASE 3: Use an agarose gel and electrophoresis to separate the DNA fragments and display a ‘profile’ that can be compared to others.
Forensic Science Research Lab, University of Nottingham
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Sian’s phone buzzed into life on her desk and she jumped like she’d been caught doing something she shouldn’t. The word KRIS flashed up from her screen. Guilt crept up her throat, stinging like bile. She grabbed the phone. It was just after two in the morning.
‘Hey,’ she said.
‘Where are you Sian? I’ve been worried.’ His voice had an edge to it. Not anger, but something close.
‘I went out for a drink,’ she said. She cast around, scrabbling for something to say that would be convincing. ‘With Ginny,’ she said. Ginny was her sister-in-law and a close friend from university, but it had been
