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Serious Crime Suite Investigations: What Suspects and Families Should Know

A guide to lengthy detention, specialist interviews and complex evidence in serious investigations.

Philip G BreenFounding Director · Last reviewed 2026
5 minute readLast reviewed Criminal Defence
Understanding your optionsThis guide outlines the main issues and possible next steps. The right approach will depend on your particular circumstances.

Serious Crime Suite investigations often involve extended questioning, multiple evidence streams and significant pressure on the detained person and family. Experienced representation is essential from the outset.

Key points

What to know at a glance

  • Request experienced representation immediately
  • Review strategy after every new disclosure
  • Raise medical and communication needs
  • Treat forensic evidence as requiring interpretation
  • Prepare for bail and evidence preservation early

Why the investigation is different

Serious allegations may involve specialist teams, repeated interviews, forensic examinations, searches and applications to extend detention. The case strategy must account for a changing evidential picture rather than a single interview.

Disclosure and phased interviews

Police may disclose information in stages and test accounts against new material. The solicitor reviews each disclosure, takes fresh instructions and considers whether the existing strategy remains appropriate. What was sensible in the first interview may require reassessment later.

Welfare and fitness

Sleep, medication, food, mental health and communication can affect interview reliability. The custody record should reflect relevant concerns. Medical assessment, breaks and adjustments may be needed, particularly during prolonged detention.

Forensic and covert evidence

Cases may involve DNA, fingerprints, firearms, CCTV, communications, surveillance, covert audio or intelligence-derived enquiries. The presence of technical material does not remove the need to establish continuity, interpretation and connection to the alleged offence.

Searches and family communication

Searches may affect homes, vehicles and devices belonging to others. Families should avoid discussing evidence or contacting witnesses. They can assist by identifying the custody location, medication and solicitor requested, while respecting the detained person’s confidentiality.

Planning beyond detention

Advice should consider possible charge, bail, remand, media interest and preservation of defence evidence. Early chronologies, witness details and expert issues may later become important. The end of interview is often the beginning of the defence preparation.

Common questions

Frequently asked questions

How long can detention last?+

It depends on the powers and judicial authorisations being used. The solicitor can explain the current position.

Can family receive details?+

Only limited information may be available, and the solicitor owes confidentiality to the detained person.

Will there be more than one interview?+

Often. Serious investigations may involve several phases.

Can experts be instructed?+

Yes, where a genuine forensic or technical issue requires independent opinion.

Primary legal sources

Legislation and official guidance

These sources are provided for transparency. Legislation may be amended or commenced in stages, and reading the statutory text is not a substitute for advice.

Important: This article is general information, not legal advice, and does not create a solicitor-client relationship. Law and procedure can change. Obtain advice about your own facts, deadlines and current legal position.

About the author

Philip G Breen

Philip has more than 30 years of experience in criminal defence, police-station practice and serious or complex criminal proceedings. This article is general information and has been reviewed for publication on 2026.

Clear advice. Practical next steps.

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