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Darby dug up two more pails and sifted the damp dirt on the screen. More rocks.

Forty minutes later, Darby had dug up about three-quarters of the area underneath the porch. The muscles in her legs and lower back ached. She thought about hanging it up when something caught her eye – a folded, corner section of what looked like paper sticking out from the dirt.

Darby moved the portable light into the hole. She used her gloved fingers to scoop away the dirt and then switched to the brush.

A handcuff key sat on top of the folded piece of paper.

‘Looks like I owe you an apology,’ Coop said.

‘Buy me di

‘It’s a date.’

Once the photographs and documentation work were completed, Darby lifted the folded piece of paper out of the hole and set it up on top of the sifting screen.

Documents required special handling and care. Because paper was nothing more than pulverized wood and glue, when wet paper was allowed to dry, it turned to glue. Folded pages and papers stacked on top of one another would be stuck together and couldn’t be pried apart.

‘Any idea when these mobile forensic units are arriving?’ Coop asked.

‘I don’t know, but if we wait too long, these pages will start to stick together and we’ll be screwed.’

As it turned out, Darby didn’t have to wait long. By the time she finished bagging the handcuff key into evidence, a Ford 350 turned the corner at the far end of the street, towing a seventy-foot trailer with ante

Chapter 52

Darby borrowed Coop’s cell phone and called Evan Ma

‘Sorry for the early call, but I’ve found some evidence at the Cranmore house – a folded wet piece of paper that was buried, along with a handcuff key, underneath the porch. One of your mobile units just arrived, and I need to open the paper before it dries. How soon can you get here?’

‘Look across the street.’

The trailer door opened. Evan Ma

The mobile forensic unit contained all the latest equipment, all of it carefully designed to fit inside the long, narrow space. Everything looked and smelled new. Displayed on one of the computer monitors was the FBI’s DNA identification system, CODIS.

‘Where are your forensic people?’ Darby asked as they walked.

‘In the air,’ Evan said. ‘They’re scheduled to touch down at Logan sometime in the next three hours. The other two mobile units have already started working the blast site in Boston. Does the paper have blood on it?’

‘I don’t know. I haven’t unfolded it yet.’

‘We should suit up, just in case.’

After they dressed, Evan handed out masks, safety goggles and neoprene gloves.

‘The neoprene will leave indentation marks if we touch the paper,’ Coop said. ‘They’ll show up during fingerprint processing. We should use cotton gloves over latex.’

The examination room was cool and gleaming white. The work counter was small. Evan stood behind Darby to give her some space.

She transferred the paper to the clean work space. Using two pairs of tweezers, she went to work unfolding the paper.

Prying the pages apart was slow, painstaking work. In addition to being wet and flimsy, the paper was badly wrinkled and had started to tear in several places from having been folded and refolded so many times.

It was an 8 × 10 sheet of white paper. The side facing them was a printout of a computer-generated color map. Most of it was unreadable. The colors had faded and several spots had been rubbed away, most likely from the perspiration from Rachel Swanson’s hands.

Two areas of the map were caked with mud. Other areas had absorbed the dirt’s dark color. Some spots were covered in dried smears of blood and with some yellow liquid, either mucus or pus.

‘Why did she fold the paper into such a tiny square?’ Coop asked.

Darby answered the question. ‘That way she could conceal the paper inside a pocket, her mouth or, if needed, her rectum.’





‘I’m glad we suited up,’ Coop said.

Darby used cotton swabs to clear away the mud from the paper, careful not to rub off any more of the color toner. Carol’s face kept flashing through Darby’s mind as she worked.

Hidden beneath the mud were computer-printed directions in neat but faded lettering. At the bottom of the sheet was the URL of the website from which the map had been printed.

Darby had to use the magnifier to read the directions.

‘It says “1.4 miles, go between two trees, go straight.”’

Evan moved behind her. ‘Any idea where the road is?’

‘Hold on.’ Darby followed the trail of the printed road, stopping when she saw what appeared to be part of a number hidden underneath dirt. She used a cotton swab to clear it away.

‘It’s Route Twenty-two,’ Darby said. ‘There’s a Route Twenty-two in Belham. It wraps around the woods on the other side of Salmon Brook Pond.’

‘Let’s take a look at the writing,’ Evan said.

Darby turned the piece of paper over. On the back, written in a shaky hand with small lettering, were notes and what appeared to be names, all written in pencil faded from perspiration and the constant folding and refolding of the paper. Some of the writing was obscured behind crusted spots of dried blood.

Using the light magnifier, she examined the sheet for several minutes.

‘Take a look at this.’ Darby stepped away from the counter to give Evan room.

‘1 S R R 2R S,’ he said. ‘Does it match what Rachel Swanson wrote on her arm at the hospital?’

Darby had consulted her PDA, where she had transferred her notes. ‘Here’s what she wrote on her arm: “1 L S 2R L R 3R S 2R 3L.”’

‘Not only are they different, they’re shorter.’

‘What’s the next line say?’

Evan read the combination of letters and numbers.

‘They’re different – and longer,’ Darby said.

Evan moved the magnifier over the paper. There are dozens of different combinations here.’

Coop said, ‘How could directions change?’

‘I don’t know,’ Evan said. ‘I was thinking it might possibly be a combination to, say, a locked door until I saw this line. It says “3: STAY AWAY.” Terry Mastrangelo’s name is written beside it with a question mark. And there are several other names here Rachel crossed out.’

‘She was keeping track of the names of the women kept with her all that time,’ Darby said, more to herself. ‘Any chance you have a Video Spectral Comparator in here?’

‘The best I’ve got is the stereomicroscope.’ Evan grabbed the piece of equipment, set it up on the table and backed away from the counter.

Darby slid onto the stool and carefully transferred the paper to the stereomicroscope. She started her examination at the top, left-hand corner of the paper. Most of the names were illegible. Several names had been crossed out.

‘There’s a space here that looks like it’s been erased,’ Darby said. ‘We can toy around with oblique lighting sources to see if we can pick up any indented writing.’

‘We’re better off using infrared reflectography,’ Coop said. ‘It works well on revealing erased pencil marks and covered signatures. We can also use it on the areas that are crossed out.’

‘I’m concerned about fingerprints.’

‘The pencil won’t wash away under any of the solvents we use. My first choice would be to try an electrostatic detection apparatus to see if we can pick up any indented writing. It won’t damage the document or any potential fingerprints.’

‘We might have a portable ESDA unit,’ Evan said. ‘I’ll have to check the equipment list.’

‘I have a name – Joa