Life insured typically does not cover death as the result of suicide within two years of opening the policy. After the contestability period, suicide is typically covered on most policies. Life insurance also does not pay out a benefit if the insured lied on any of the medical questions asked when applying for the policy.
Some policies do not cover death as a result of high-risk activities, such as bungee jumping or skydiving. Exact coverage details will be determined by your policy, and it's best to meet with an insurance professional to determine what activities may not be covered.
And, though it is awful to think about, if a policyholder is murdered by one of the life insurance policy beneficiaries, there is no payout to that beneficiary. Instead, the payout may be directed to a contingent beneficiary but this all depends on the circumstances surrounding the crime.