(1)A person commits an offence if the person, without reasonable excuse, intentionally—
(a)obstructs a person mentioned in subsection (2), or
(b)otherwise interferes with a police investigation into an incident in relation to which a constable has reasonable grounds to suspect that a child, while under 12 years of age—
(i)by behaving in a violent or dangerous way, has caused or risked causing serious physical harm to another person, or
(ii)by behaving in a sexually violent or sexually coercive way, has caused or risked causing harm (whether physical or not) to another person.
(2)The person is a constable or other person acting in pursuance of—
(a)section 28(2),
(b)an order under section 36,
(c)a child interview order,
(d)authorisation under section 54(2),
(e)an order under section 63,
(f)authorisation under section 69(1).
(3)A person who commits an offence under subsection (1) is liable on summary conviction to a fine not exceeding level 3 on the standard scale.