The police have called me and asked me to speak with them about an investigation. Should I call a lawyer before I speak with the police?

The unequivocal answer to this question is yes!  What happens at an initial meeting with the police about a case can have long-lasting consequences that affect the result in your case.  You have important rights to counsel and to remain silent.  An attorney can consult with you, advise you about your rights, and can even begin negotiating a resolution with the police at this stage.  In some cases, a lawyer may be able to arrange a settlement of the case that prevents the filing of criminal charges.