Dr. Alan Mercer was located at his clinic before noon.
He did not resist when police arrived.
He asked for a lawyer.
That made Ruiz suspicious.
“He knew we were coming,” she said.
Sarah explained that Arthur had terminated Mercer six months earlier.
Mercer insisted it had nothing to do with Arthur's death.
He said Arthur had become paranoid.
“Paranoid about what?”
“Money.”
Ruiz looked at him.
“That's convenient.”
Mercer remained calm.
He was a small man with thin glasses and a perfectly pressed shirt.
He didn't look like someone who had been accused of helping kill an eighty-nine-year-old man.
He looked like someone who expected the accusation to disappear.
I asked whether he had treated Arthur the day before his death.
He said no.
The appointment card proved otherwise.
He finally admitted that Arthur had visited.
“Why did you lie?”
“I forgot.”
“An appointment you had scheduled that morning?”
He didn't answer.
Sarah asked whether he had administered any medication.
“Routine examination.”
“Injection?”
“No.”
Ruiz placed the toxicology report on the desk.
Mercer read it.
His expression changed for only a second.
But I saw it.
He knew something.
Ruiz saw it too.
“You recognize the result.”
“No.”
“You looked surprised.”
“I'm a physician.”
“That wasn't my question.”
Mercer asked for his lawyer again.
Then the receptionist interrupted.
She had found something in the clinic's medication cabinet.
A vial was missing.
The label had been removed.
Mercer said it was impossible.
The cabinet was locked.
Ruiz asked who had the key.
Mercer.
The clinic manager.
And one other person.
“Who?”
“Gerald Price.”
I stared at him.
“Why would a financial adviser have access to medication?”
Mercer hesitated.
“He didn't.”
“Then why did you say he had a key?”
“I didn't.”
Ruiz stepped forward.
“You did.”
Mercer looked toward the door.
That was enough.
The detectives searched the clinic.
They found discarded paperwork in a shredder.
Most of it was unreadable.
One fragment wasn't.
Arthur Vance.
Appointment.
10:30 a.m.
Private consultation.
Below that was a handwritten note.
PATIENT REFUSED INJECTION.
I felt my chest tighten.
“Arthur refused.”
Mercer nodded.
“Yes.”
“Then what happened?”
“He left.”
Ruiz asked whether anyone accompanied him.
Mercer said no.
But the receptionist remembered otherwise.
A woman had arrived with Arthur.
The receptionist didn't know her name.
She described her.
Dark hair.
Gray streaks.
Middle-aged.
Nora.
Nora shook her head.
“I wasn't there.”
Mercer looked at her.
Then he looked away.
Ruiz noticed.
“Who was with Arthur?”
Mercer refused to answer.
Sarah checked the appointment records.
The visitor's name had been entered manually.
NORA REED.
Nora stared at the page.
“I never went there.”
Mercer looked at her.
“You did.”
“No.”
“You came with him.”
“I told you I didn't.”
Ruiz asked for security footage.
The clinic had cameras.
The footage showed Arthur arriving alone.
Then someone entering behind him.
The image was blurred.
But the person wore a dark coat.
The face was hidden.
The person left twelve minutes later.
Arthur remained inside.
Then he left alone.
Nora watched the footage.
“That isn't me.”
She pointed.
“The shoes.”
The visitor wore white sneakers.
Nora wore black boots.
Ruiz enlarged the frame.
The shoes were distinctive.
White with a dark stripe.
Kevin's shoes.
He had been at the clinic.
Kevin had followed Arthur.
The detectives found him at a bus station later that afternoon.
He surrendered.
His story changed again.
He admitted following Arthur.
He said he wanted money.
He denied poisoning him.
“I saw Dad go into the clinic.”
“Why?”
“I wanted to talk to him.”
“Did you see Mercer?”
“Yes.”
“Did you see Mark?”
“No.”
“Did you see Gerald?”
Kevin hesitated.
“Yes.”
Ruiz stared.
“When?”
“At the clinic.”
That connected all three men.
Kevin said Gerald gave Mercer an envelope.
He didn't know what was inside.
He saw Mercer give something to Arthur.
Arthur refused it.
Then Gerald left.
Kevin followed Gerald.
He said he didn't see anyone inject Arthur.
“Then why did you run?”
“Because Gerald saw me.”
Kevin admitted he had taken the thermos afterward.
Not to poison it.
To make investigators believe Gerald had poisoned Arthur.
He wanted to frame Gerald because Gerald had threatened him.
The thermos had been contaminated after Arthur's death.
Kevin confessed.
That explained the false clue.
But it didn't explain Arthur's death.
Ruiz asked about Mark.
Kevin finally admitted Mark had hired Gerald.
But Mark didn't order the killing.
He wanted Arthur declared mentally incompetent.
He wanted control of the estate.
Gerald agreed.
Then Mercer became involved.
The plan had been to convince Arthur to sign a new document.
When he refused, everything changed.
Mercer said Arthur's health was already failing.
Gerald said there was another solution.
Kevin wouldn't explain.
He simply said, “Ask Mark.”
Mark was still missing.
His house had been searched.
The police found his passport.
His car was gone.
But there was one item missing.
A black notebook.
The same type of notebook Arthur used.
Ruiz believed Mark had taken it.
Then Claire remembered something.
“Dad had another notebook.”
“Where?”
“In the garage.”
We returned home.
The garage smelled of oil and dust.
Arthur's old workbench stood against the wall.
I had repaired dozens of things there.
Claire opened a cabinet.
Behind paint cans was a narrow metal box.
Inside was a notebook.
Not Arthur's handwriting.
Mark's.
The pages contained dates.
Payments.
Names.
Amounts.
Gerald.
Mercer.
Kevin.
And one name I didn't recognize.
ELENA.
Claire looked at me.
“Who is Elena?”
Sarah turned pale.
“I know that name.”
“How?”
“She was Arthur's private caregiver.”
I remembered her.
She had visited twice.
Arthur had dismissed her after one week.
He told me she wasn't trustworthy.
I had assumed he was being difficult.
Sarah turned the page.
There was a payment to Elena.
Five thousand dollars.
Then another.
Then a note.
KEEP HER AWAY FROM DAD.
I looked at Claire.
“Why would Mark pay her?”
“I don't know.”
Sarah read the next page.
The answer was there.
Elena had worked at the private clinic.
She had access to medical records.
She had also been present the day Arthur visited Mercer.
The page contained one sentence.
Elena knows about the injection.
My stomach dropped.
The notebook wasn't a plan.
It was a record of Mark's attempts to control witnesses.
He had paid Elena to stay silent.
But about what?
We found Elena that evening.
She lived in a small apartment across town.
When Ruiz showed her the notebook, she began crying.
“I didn't kill him.”
“What did you see?”
“I saw Dr. Mercer prepare an injection.”
“Did he administer it?”
“No.”
“Who did?”
Elena shook her head.
“Arthur refused.”
“Then what happened?”
“Gerald came in.”
“After the refusal?”
“Yes.”
“And?”
“Arthur became angry.”
She described the argument.
Arthur accused Gerald of stealing from him.
Gerald denied it.
Then Arthur said he had proof.
He threatened to expose all of them.
Mercer told Gerald the situation was finished.
Gerald left.
Elena said she followed him.
She saw someone waiting in the parking lot.
A woman.
Dark hair.
Gray streaks.
Elena believed it was Nora.
Nora immediately denied it.
But Elena wasn't finished.
“She was wearing white sneakers.”
The room went silent.
Nora looked down.
She was wearing black boots.
Then Elena said something else.
“I saw her face.”
Ruiz leaned closer.
“Who was it?”
Elena looked at Claire.
“I don't know her.”
“Then who?”
Elena pointed toward the doorway.
The person standing there was Mark.
He had come back.
He looked at his sister.
Then at me.
And finally at Sarah.
“I can explain.”
Ruiz stepped forward.
“You're under arrest.”
Mark didn't run.
He simply said, “I didn't kill Dad.”
Ruiz handcuffed him.
“Then tell us who did.”
Mark looked directly at Claire.
“You need to ask your wife.”
I felt the blood drain from my face.
Claire stared at him.
“What are you talking about?”
Mark smiled bitterly.
“Ask her what happened before Dad moved into your house.”
